Spymaster's Vault [Modern Horizons 3]

Set: Modern Horizons 3 Type: Land Rarity: Rare Spymaster's Vault enters the battlefield tapped unless you control a Swamp.{T}: Add {B}.{B}, {T}: 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.)