Spells and abilities your opponents control can't cause you to sacrifice permanents.

When this creature enters, you take the initiative. Crown of Madness — {1}{R}, Sacrifice an artifact or creature: Goad target creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Haste At the beginning of your upkeep, you may sacrifice a creature. When you do, this creature deals 2 damage to target opponent or planeswalker.

Whenever a player activates an ability that isn't a mana ability, this creature deals 1 damage to that player.

{T}: Heartless Hidetsugu deals damage to each player equal to half that player's life total, rounded down.

Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player. {3}{R}{R}: This creature gets +3/+3 and gains menace until end of turn.

Whenever an opponent casts a spell, Kaervek deals damage equal to that spell's mana value to any target.

This creature can't block. When this creature enters, you draw a card and you lose 1 life. {2}{B}{B}: Return this card from your graveyard to your hand.

Whenever this creature attacks, you may pay {1} and discard a card. If you do, draw a card. Whenever you discard one or more nonland cards, you may exile one of them from your graveyard. If you do, you may cast it this turn.

{1}, Sacrifice a creature: Exile the top card of your library. You may play that card this turn. (You still pay its costs. You can play a land this way only if you have an available land play remaining.)

At the beginning of your end step, you may pay {2}{R} and sacrifice a nonland permanent. If you do, reveal cards from the top of your library until you reveal a nonland permanent card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

Menace (This creature can't be blocked except by two or more creatures.) Megamorph {R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.) When this creature is turned face up, exile the top card of your library. Until end of turn, you may play that card.

Undergrowth — When Izoni enters, create a 1/1 black and green Insect creature token for each creature card in your graveyard. {B}{G}, Sacrifice another creature: You gain 1 life and draw a card.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with this creature, you may reveal it. If you do, you may play that card without paying its mana cost.

When this creature enters, draw a card. Whenever you cast a creature spell, you may pay {G}{G}. If you do, return this card from your graveyard to your hand.

When this creature enters, target opponent reveals their hand. You may cast an instant or sorcery spell from among those cards without paying its mana cost.

Double strike, trample Whenever this creature deals combat damage to a player, exile the top card of your library. You may play it this turn.

Changeling (This card is every creature type.) As this creature enters, choose a creature type. You may look at the top card of your library any time. You may cast creature spells of the chosen type from the top of your library.

Spectacle {2}{B}{R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) When this creature enters, discard a card, then draw a card. If this creature's spectacle cost was paid, instead discard your hand, then draw three cards.

When this creature enters, discard two cards, then draw two cards. For each nonland card discarded this way, create a 1/1 red Elemental creature token. {3}{R}{R}, Exile this card from your graveyard: Create two 1/1 red Elemental creature tokens.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with this creature, you may reveal it. If you do, each player discards their hand, then draws four cards.

{2}{B}, Sacrifice a creature: Draw a card.

Haste {1}: Another target creature with power 2 or less can't be blocked this turn. {1}{R}, {T}, Discard your hand: Until end of turn, whenever a creature you control with power 2 or less deals combat damage to a player, draw a card.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Whenever a creature you control with a +1/+1 counter on it dies, draw a card.

Bloodrush — {1}{R}, Discard this card: Target attacking creature gets +3/+1 until end of turn. Whenever one or more creatures you control deal combat damage to a player, if this card is in your graveyard, you may pay {3}. If you do, return this card to your hand.

Whenever you attack, you may sacrifice another creature or an artifact. If you do, create a 4/1 black Skeleton creature token with menace that's tapped and attacking. (It can't be blocked except by two or more creatures.) Choose a Background (You can have a Background as a second commander.)

Flying When this creature deals combat damage to a player, create two 1/1 red Goblin creature tokens and sacrifice this creature. Unearth {3}{B}{R} ({3}{B}{R}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

{1}{B}{G}: Target creature gets +1/+1 and gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.) {2}{B}{G}, Sacrifice a nontoken creature: Create X 1/1 green Saproling creature tokens, where X is the sacrificed creature's toughness.

At the beginning of combat on your turn, create a 2/1 red Elemental creature token with trample and haste. Sacrifice it at the beginning of the next end step. {T}: Search your library for a card, put it into your hand, then shuffle. Activate only if five or more creatures died this turn.

{1}{G}, Sacrifice this creature: Create a 1/3 green Spider enchantment creature token with reach. (It can block creatures with flying.)

Inspired — Whenever this creature becomes untapped, you may pay {1}{R}. If you do, create a token that's a copy of another target creature, except it's an enchantment in addition to its other types. It gains haste. Exile it at the beginning of the next end step.

({T}: Add {R} or {G}.) This land enters tapped unless you control two or more basic lands.

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

This land enters tapped unless you control a Swamp or a Mountain. {T}: Add {B} or {R}.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

({T}: Add {G}.)

{T}: Add {C}. {T}, Sacrifice a creature: You gain 1 life.

({T}: Add {R}.)

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

This land enters tapped unless you control a Mountain or a Forest. {T}: Add {R} or {G}.

This land enters tapped. {T}: Add {B}, {R}, or {G}.

({T}: Add {B} or {R}.) This land enters tapped unless you control two or more basic lands.

({T}: Add {B}.)

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

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

Treefolk spells and Shaman spells you cast cost {1} less to cast.

As long as this creature is tapped, creature spells you cast cost {2} less to cast.

{T}: Add one mana of any color. {7}, {T}, Sacrifice this creature: Create a 5/5 red Dragon creature token with flying.

At the beginning of your end step, if you control a creature with power 5 or greater, you may have this creature deal 2 damage to target player or planeswalker. {T}: Add {C}.

Each spell you cast that's red or green costs {1} less to cast.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) {T}: Add {B}, {R}, or {G}.

{1}: Add {B} or {R}. Activate no more than three times each turn.

Play with the top card of your library revealed. As long as the top card of your library is a creature card, this creature gets +3/+3. As long as the top card of your library is a land card, this creature has "{T}: Add two mana of any one color."

{G}: Add one mana of any color.

Whenever this creature or another nontoken creature you control dies, you may create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this token: Add {C}."

Other Snake creatures you control get +0/+1. Shamans you control have "{T}: Add {G}{G}."

Whenever a creature you control deals combat damage to a player, add that much {G}. Until end of turn, you don't lose this mana as steps and phases end.

Sacrifice this creature: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

{2}: Target creature gains trample until end of turn. If this is the third time this ability has resolved this turn, you may add {R}{R}{R}{R}{R}{R}{R}{R}.

{T}: Add {C}{C}.

{T}: Add {G}. Ferocious — {T}: Add {G}{G}. Activate only if you control a creature with power 4 or greater.

{T}: Add one mana of any color. {6}{G}, {T}: Another target creature gets +3/+3 and gains trample until end of turn.

Each other non-Human creature you control enters with an additional +1/+1 counter on it.

Whenever another creature dies, you may gain 1 life.

Whenever another creature enters, you gain 1 life.

When this creature enters, you may return target card from your graveyard to your hand.

{4}{B}, Sacrifice a creature: Return target creature card from your graveyard to your hand. {4}{G}: Put a +1/+1 counter on target creature.

Whenever another creature you control dies, you get an experience counter. At the beginning of your end step, choose target creature card in your graveyard. If that card's mana value is less than or equal to the number of experience counters you have, return it to the battlefield. Otherwise, put it into your hand.

Megamorph {2}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.) When this creature is turned face up, it deals 1 damage to any target.

Sacrifice this creature: It deals 3 damage to target player or planeswalker. Activate only during your upkeep.

{T}, Sacrifice a creature: This creature deals 1 damage to any target.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with this creature, you may reveal it. If you do, this creature deals 2 damage to each creature.

{R}, {T}, Sacrifice a creature: This creature deals 2 damage to any target.

Megamorph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.) When this creature is turned face up, destroy target artifact or enchantment an opponent controls.

At the beginning of your upkeep, each player sacrifices a non-Vampire creature of their choice.

{1}{R}: Put a +1/+1 counter on Ashling. If this is the third time this ability has resolved this turn, remove all +1/+1 counters from Ashling, and it deals that much damage to each creature and each player.