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.
As Rukarumel enters, choose a creature type.Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield., : Create a 1/1 colorless Sliver creature token.
This spell can't be countered.FlyingWhenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target.Whenever a player casts an instant or sorcery spell, you draw a card.
Myriad Landscape enters tapped.: Add ., , Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.
Flash (You may cast this spell any time you could cast an instant.)When Seht's Tiger enters, you gain protection from the color of your choice until end of turn. (You can't be targeted, dealt damage, or enchanted by anything of the chosen color.)
When Oreskos Explorer enters, search your library for up to X Plains cards, where X is the number of players who control more lands than you. Reveal those cards, put them into your hand, then shuffle.