Whenever a creature you control deals combat damage to a player, you may draw a card. {1}{U}, {T}: Creatures your opponents control attack this turn if able.
Landfall — Whenever a land you control enters, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.) 0/3
Return all creatures to their owners’ hands. For each opponent who controlled a creature returned this way, you create two 1/1 blue Faerie creature tokens with flying and “This creature can block only creatures with flying.”
Flash When Dress Down enters, draw a card. Creatures lose all abilities. At the beginning of the end step, sacrifice Dress Down.
Whenever one or more nontoken Merfolk you control become tapped, create a 1/1 blue Merfolk creature token with hexproof.
All creatures get -X/-0, where X is the number of cards in your hand.
(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Target player takes an extra turn after this one. Return up to one target nonland permanent to its owner’s hand. Exile Karn’s Temporal Sundering.
At the beginning of your upkeep, you may exchange control of target nonland permanent you control and target nonland permanent an opponent controls with equal or lesser mana value.
Counter target spell. If that spell is countered this way, put that card on the top or bottom of its owner’s library instead of into that player’s graveyard.
End the turn. (Exile all spells and abilities from the stack, including this card. The player whose turn it is discards down to their maximum hand size. Damage wears off, and “this turn” and “until end of turn” effects end.)
You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. Once during each of your turns, you may cast a spell from your hand or the top of your library without paying its mana cost.
Exile target creature and put two time counters on it. If it doesn’t have suspend, it gains suspend. (At the beginning of its owner’s upkeep, they remove a time counter. When the last is removed, they may play it without paying its mana cost. If it’s a creature, it has haste.)