Whenever you discard a card, exile that card from your graveyard. {2}, {T}: Draw a card, then discard a card. {4}, {T}, Sacrifice Bag of Holding: Return all cards exiled with Bag of Holding to their owner's hand.

Whenever you draw a card, put a +1/+1 counter on Chasm Skulker. When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.)

{T}, Discard your hand, Sacrifice Diamond Lion: Add three mana of any one color. Activate only as an instant.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) {U}, {T}: Draw a card, then discard a card.

Haste Whenever you discard a card, Glint-Horn Buccaneer deals 1 damage to each opponent. {1}{R}, Discard a card: Draw a card. Activate only if Glint-Horn Buccaneer is attacking.

This spell costs {2} less to cast for each card you've cycled or discarded this turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever you draw your second card each turn, Irencrag Pyromancer deals 3 damage to any target.

Whenever you draw your second card each turn, create two 1/1 black Rat creature tokens.

Flying Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target. {T}: Draw a card.

Flying Whenever you draw a card, put a +1/+1 counter on Oneirophage.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

Trample When Rowdy Crew enters the battlefield, draw three cards, then discard two cards at random. If two cards that share a card type are discarded this way, put two +1/+1 counters on Rowdy Crew.

Menace When Ruin Grinder dies, each player may discard their hand and draw seven cards. Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Whenever you discard a creature card, put a +1/+1 counter on Surly Badgersaur. Whenever you discard a land card, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") Whenever you discard a noncreature, nonland card, Surly Badgersaur fights up to one target creature you don't control.

Whenever you draw your second card each turn, create a 1/1 blue Faerie creature token with flying. {4}{U}{R}: Draw a card, then discard a card.

Whenever you draw a card, you may have target player mill a card.

Whenever you draw a card, put a foreshadow counter on Ominous Seas. Remove eight foreshadow counters from Ominous Seas: Create an 8/8 blue Kraken creature token. Cycling {2} ({2}, Discard this card: Draw a card.)

(Gain the next level as a sorcery to add its ability.) When Sorcerer Class enters the battlefield, draw two cards, then discard two cards. {U}{R}: Level 2 Creatures you control have "{T}: Add {U} or {R}. Spend this mana only to cast an instant or sorcery spell or to gain a Class level." {3}{U}{R}: Level 3 Whenever you cast an instant or sorcery spell, that spell deals damage to each opponent equal to the number of instant and sorcery spells you've cast this turn.

Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process. {5}{U}: Draw a card, then discard a card.

When Teferi's Tutelage enters the battlefield, draw a card, then discard a card. Whenever you draw a card, target opponent mills two cards. (They put the top two cards of their library into their graveyard.)

Choose one — • Counter target noncreature spell unless its controller pays {2}. • Izzet Charm deals 2 damage to target creature. • Draw two cards, then discard two cards.

Draw X cards. For each card drawn this way, discard a card unless you sacrifice a permanent.

{T}: Add {C}. Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

+2: Discard up to two cards, then draw that many cards. −2: Sacrifice an artifact. If you do, return target artifact card from your graveyard to the battlefield. −10: You get an emblem with "Whenever an artifact is put into your graveyard from the battlefield, return that card to the battlefield at the beginning of the next end step." Daretti, Scrap Savant can be your commander.

Draw two cards, then discard two cards. Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Return up to one target instant card and up to one target sorcery card from your graveyard to your hand, then discard a card. Exile Shreds of Sanity.

As an additional cost to cast this spell, discard a card. Draw two cards.