Spymaster's Vault (Modern Horizons 3 358) - Rare Magic: The Gathering Card

Spymaster's Vault enters the battlefield tapped unless you control a Swamp.: Add ., : Target creature you control connives X, where X is the number of creatures that died this turn. (Draw X cards, then discard X cards. Put a +1/+1 counter on that creature for each nonland card discarded this way.)