Instant and sorcery spells you cast cost less to cast.Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)FlyingAt the beginning of your end step, each opponent discards a card., Sacrifice an artifact: Target creature gets -2/-2 until end of turn.
HasteWhenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.Sacrifice another creature: Yahenni gains indestructible until end of turn.
Flying, vigilanceCrew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)You may remove a loyalty counter from a planeswalker you control rather than pay Heart of Kiran's crew cost.
+1: Create a colorless artifact token named Etherium Cell with ", Sacrifice this artifact: Add one mana of any color."−2: Target creature gets +X/-X until end of turn, where X is the number of artifacts you control.−7: You get an emblem with "At the beginning of combat on your turn, target artifact you control becomes an artifact creature with base power...
HasteWhenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.Sacrifice another creature: Yahenni gains indestructible until end of turn.
Gain control of target creature or Vehicle until end of turn. Untap it. It gains haste until end of turn.You may cast a spell with mana value 2 or less from your hand without paying its mana cost.
