Creatures you control have base power and toughness X/X until end of turn.

As Black Vise enters the battlefield, choose an opponent.
At the beginning of the chosen player's upkeep, Black Vise deals X damage to that player, where X is the number of cards in their hand minus 4.

Blightning deals 3 damage to target player or planeswalker. That player or that planeswalker's controller discards two cards.

Whenever you cast an instant or sorcery spell, Blistercoil Weird gets +1/+1 until end of turn. Untap it.

, , Put a blood counter on Bloodletter Quill: Draw a card, then you lose 1 life for each blood counter on Bloodletter Quill.
: Remove a blood counter from Bloodletter Quill.

Enchant creature
Enchanted creature attacks each combat if able.

Whenever you cast a spell, you may gain ½ life for each word in that spell's name.

Prevent all damage that would be dealt to target multicolored creature this turn. For each 1 damage prevented this way, put a +1/+1 counter on that creature.

Whenever a player activates an ability that isn't a mana ability, Burning-Tree Shaman deals 1 damage to that player.

(Theme color: )

Chained Brute doesn't untap during your untap step.
, Sacrifice another creature: Untap Chained Brute. Activate this ability only during your turn.

Aftermath (Cast this spell only from your graveyard. Then exile it.)
Discard any number of cards, then draw that many cards.

When you encounter Chaotic Aether, each blank roll of the planar die is a CHAOS roll until a player planeswalks away from a plane. (Then planeswalk away from this phenomenon.)

At the beginning of your upkeep, return an instant or sorcery card at random from your graveyard to your hand.
Whenever you cast an instant or sorcery spell, Charmbreaker Devils gets +4/+0 until end of turn.

Flying
When Cloudblazer enters the battlefield, you gain 2 life and draw two cards.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Reach
Whenever this creature mutates, you may discard a card. If you do, draw a card.

Flying
: Coastline Chimera can block an additional creature this turn.

Draft Cogwork Librarian face up.
As you draft a card, you may draft an additional card from that booster pack. If you do, put Cogwork Librarian into that booster pack.

Enchant artifact or creature
Enchanted permanent doesn't untap during its controller's untap step.

Surveil 3, then return a creature card from your graveyard to the battlefield.