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'At the beginning of each opponent's draw step, you draw a card. [+1]: Create a 1/1 blue Illusion creature token. [−2]: For each opponent, return up to one target artifact...
'Flying Whenever this creature deals combat damage to a player, roll a d20. When you do, put any number of target creature cards with total mana value X or less...
'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. If you cast a spell...
'{T}: Add {B}.
{T}: Target creature loses first strike or swampwalk until end of turn.
Whenever you play a land from exile or cast a spell from exile, you gain 2 life. Draw Arcanum — {T}: Look at the top card of your library. You...
'Flash
Whenever an opponent searches their library, you gain 1 life and draw a card.
'Creatures you control get +1/+0.
[+1]: Add {R} or {G}. Creature spells you cast this turn can't be countered.
[−2]: Target creature you control fights target creature you don't control.
'Flying When this creature enters, scry 3. (Look at the top three cards of your library, then put any number of them on the bottom and the rest on top...
Whenever you play a land from exile or cast a spell from exile, you gain 2 life. Draw Arcanum — {T}: Look at the top card of your library. You...
'Trample Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Aurochs. {2}{S}: Target creature blocks target creature this turn if able. ({S} can be...
'Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, target creature gets +4/+0 until end of turn.
'All creatures lose indestructible until end of turn. Hour of Devastation deals 5 damage to each creature and each non-Bolas planeswalker.