All Sliver creatures have "This creature gets +1/+1 as long as you control a Swamp."All Slivers have ": Regenerate this permanent." (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)
Tolaria West enters tapped.: Add .Transmute (, Discard this card: Search your library for a card with mana value 0, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)
FlyingWhenever another creature you control enters, you may discard a card. If you do, put a +1/+1 counter on that creature, it gains haste until end of turn, and it becomes a Vampire in addition to its other types.
When Gray Merchant of Asphodel enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each in the mana costs of permanents you control counts toward your devotion to black.)
Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.: Draw a card, then discard a card.
+1: Create a 0/1 green Plant creature token.−2: Put a +1/+1 counter on each creature you control.−7: You gain X life and draw X cards, where X is the number of lands you control.