Partner with Ukkima, Stalking Shadow (When this creature enters the battlefield, target player may put Ukkima into their hand from their library, then shuffle.) Whenever a creature you control deals combat damage to a player, put a +1/+1 counter on that creature.

Flying, trample Whenever Demon of Loathing deals combat damage to a player, that player sacrifices a creature.

Flying Lieutenant — As long as you control your commander, Demon of Wailing Agonies gets +2/+2 and has "Whenever Demon of Wailing Agonies deals combat damage to a player, that player sacrifices a creature."

Trample, haste Whenever Froghemoth deals combat damage to a player, exile up to that many target cards from their graveyard. Put a +1/+1 counter on Froghemoth for each creature card exiled this way. You gain 1 life for each noncreature card exiled this way.

Flying Whenever a creature you control deals combat damage to a player, put that many +1/+1 counters on it.

Trample Whenever Scion of Darkness deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control. Cycling {3} ({3}, Discard this card: Draw a card.)

Flying If Szadek, Lord of Secrets would deal combat damage to a player, instead put that many +1/+1 counters on Szadek and that player mills that many cards.

Flying Whenever Vorosh, the Hunter deals combat damage to a player, you may pay {2}{G}. If you do, put six +1/+1 counters on Vorosh.

Flying Whenever Dazzling Sphinx deals combat damage to a player, that player exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then that player puts the exiled cards that weren't cast this way on the bottom of their library in a random order.

Flying Whenever Emissary of Despair deals combat damage to a player, that player loses 1 life for each artifact they control.

Menace Whenever Kheru Mind-Eater deals combat damage to a player, that player exiles a card from their hand face down. You may look at cards exiled with Kheru Mind-Eater, and you may play lands and cast spells from among those cards.

Trample Whenever Storrev, Devkarin Lich deals combat damage to a player or planeswalker, return to your hand target creature or planeswalker card in your graveyard that wasn't put there this combat.

Flying Whenever Thief of Sanity deals combat damage to a player, look at the top three cards of that player's library, exile one of them face down, then put the rest into their graveyard. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast it.

Whenever equipped creature attacks, defending player reveals cards from the top of their library until they reveal a land card. The creature gets +1/+0 until end of turn for each card revealed this way. That player puts the revealed cards into their graveyard. Equip {2}

Equipped creature gets +2/+0 and has deathtouch. {5}{B}{B}{B}: Until end of turn, Vorpal Sword gains "Whenever equipped creature deals combat damage to a player, that player loses the game." Equip {B}{B}

Flying Whenever Abomination of Gudul deals combat damage to a player, you may draw a card. If you do, discard a card. Morph {2}{B}{G}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Whenever Acquisition Octopus or equipped creature deals combat damage to a player, draw a card. Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, you may draw a card.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever Cold-Eyed Selkie deals combat damage to a player, you may draw that many cards.

Whenever a creature deals combat damage to one of your opponents, its controller may draw a card.

Choose target creature you control. Whenever that creature deals combat damage to a player or planeswalker this turn, draw that many cards.

Flying Whenever Bladegriff Prototype deals combat damage to a player, destroy target nonland permanent of that player's choice that one of your opponents controls.

Etrata, the Silencer can't be blocked. Whenever Etrata deals combat damage to a player, exile target creature that player controls and put a hit counter on that card. That player loses the game if they own three or more exiled cards with hit counters on them. Etrata's owner shuffles Etrata into their library.

At the beginning of your end step, if Kaito Shizuki entered the battlefield this turn, he phases out. +1: Draw a card. Then discard a card unless you attacked this turn. −2: Create a 1/1 blue Ninja creature token with "This creature can't be blocked." −7: You get an emblem with "Whenever a creature you control deals combat damage to a player, search your library for a blue or black creature card, put it onto the battlefield, then shuffle."

Flying Whenever Master of Predicaments deals combat damage to a player, choose a card in your hand. That player guesses whether the card's mana value is greater than 4. If the player guessed wrong, you may cast the card without paying its mana cost.

Flying Whenever Mirko Vosk, Mind Drinker deals combat damage to a player, that player reveals cards from the top of their library until they reveal four land cards, then puts those cards into their graveyard.

If a nontoken creature would die, exile that card with a blood counter on it instead. As long as an exiled creature card with a blood counter on it has flying, Rayami, First of the Fallen has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance.

Trample Whenever Spawnwrithe deals combat damage to a player, create a token that's a copy of Spawnwrithe.

{T}: Add {C}. {G}{U}, {T}: You may cast spells this turn as though they had flash.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell.

Bad River enters the battlefield tapped. {T}, Sacrifice Bad River: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

{T}: Add one mana of any color in your commander's color identity.

{1}, {T}: Add {U}{B}.

({T}: Add {U} or {B}.) Fetid Pools enters the battlefield tapped. Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Add {C}. {2}, {T}, Sacrifice Field of Ruin: Destroy target nonbasic land an opponent controls. Each player searches their library for a basic land card, puts it onto the battlefield, then shuffles.

({T}: Add {G}.)

({T}: Add {B} or {G}.) Haunted Mire enters the battlefield tapped.

({T}: Add {U}.)

{T}: Add {C}. {T}: Add {B} or {G}. Llanowar Wastes deals 1 damage to you.

{T}: Add {C}. {G}{U}, {T}: Put a +1/+1 counter on each creature that entered the battlefield this turn.

Opulent Palace enters the battlefield tapped. {T}: Add {B}, {G}, or {U}.

({T}: Add {G} or {U}.) Rimewood Falls enters the battlefield tapped.

{T}: Add {U}. If you played a land this turn, add {B} instead.

{T}: Add {C}. {2}, {T}: Return target commander you own from the battlefield to your hand. Activate only during your turn.

({T}: Add {U} or {B}.) Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

({T}: Add {B}.)

({T}: Add {G} or {U}.) Tangled Islet enters the battlefield tapped.

Thran Portal enters the battlefield tapped unless you control two or fewer other lands. As Thran Portal enters the battlefield, choose a basic land type. Thran Portal is the chosen type in addition to its other types. Mana abilities of Thran Portal cost an additional 1 life to activate.

({T}: Add {B} or {G}.) Woodland Chasm enters the battlefield tapped.

Counter target noncreature spell. Its controller loses 2 life.

Counter target spell with mana value 4 or greater.

Whenever you attack, put a shield counter on target attacking creature. Until end of turn, it gains "Whenever this creature deals combat damage to a player, remove a shield counter from it. If you do, draw a card." (If a creature with a shield counter on it would be dealt damage or destroyed, remove a shield counter from it instead.)

Prevent all combat damage that would be dealt this turn by creatures with no +1/+1 counters on them.

Draw a card for each creature you control with a +1/+1 counter on it. Those creatures gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

Graft 3 (This creature enters the battlefield with three +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.) {2}: Target creature with a +1/+1 counter on it gains shroud until end of turn. (It can't be the target of spells or abilities.)

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

As an additional cost to cast this spell, sacrifice a land. Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color." −1: Put a +1/+1 counter on target creature.

Reach Modified creatures you control have trample. (Equipment, Auras you control, and counters are modifications.) Whenever a modified creature you control deals combat damage to a player, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Enchant creature Whenever enchanted creature deals combat damage to a player, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

{T}: Add {C}. Put a point counter on Strixhaven Stadium. Whenever a creature deals combat damage to you, remove a point counter from Strixhaven Stadium. Whenever a creature you control deals combat damage to an opponent, put a point counter on Strixhaven Stadium. Then if it has ten or more point counters on it, remove them all and that player loses the game.

Exile target creature. Put X +1/+1 counters on a commander creature you control, where X is the power of the creature exiled this way.

Flying Whenever Blizzard Specter deals combat damage to a player, choose one — • That player returns a permanent they control to its owner's hand. • That player discards a card.

{3}, {T} or {U}, {T}: Return target creature to its owner's hand unless its controller pays {1}.

Each player returns a creature they control to its owner's hand.

Choose one — • Destroy target monocolored creature. • Destroy target artifact or enchantment. • Draw two cards, then discard a card.

Flying Whenever Trygon Predator deals combat damage to a player, you may destroy target artifact or enchantment that player controls.

Horrors you control have menace. Whenever a Horror you control deals combat damage to a player, that player mills that many cards. At the beginning of your end step, choose target artifact or creature card in an opponent's graveyard that was put there from their library this turn. Put it onto the battlefield under your control.

Flying When Doomsday Specter enters the battlefield, return a blue or black creature you control to its owner's hand. Whenever Doomsday Specter deals combat damage to a player, look at that player's hand and choose a card from it. The player discards that card.

Flying, first strike Whenever Drana, Liberator of Malakir deals combat damage to a player, put a +1/+1 counter on each attacking creature you control.

Trample Whenever Grim Flayer deals combat damage to a player, surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Delirium — Grim Flayer gets +2/+2 as long as there are four or more card types among cards in your graveyard.

Menace Whenever Grime Gorger attacks, exile up to one card of each card type from defending player's graveyard. Put a +1/+1 counter on Grime Gorger for each card exiled this way.

Deathtouch Whenever Misfortune Teller enters the battlefield or deals combat damage to a player, exile target card from a graveyard. If it was a creature card, create a 2/2 black Rogue creature token. If it was a land card, create a Treasure token. Otherwise, you gain 3 life.

When Mwonvuli Beast Tracker enters the battlefield, search your library for a creature card with deathtouch, hexproof, reach, or trample and reveal it. Shuffle and put that card on top.