Liliana of the Dark Realms

Each of Liliana's abilities refers to lands (or land cards) with the subtype Swamp, not just ones named Swamp.

You can activate Liliana's first ability even if your library contains no Swamp cards (or you don't want to find one). You'll still search your library and shuffle it.

When you activate Liliana's second ability, you choose only the target creature. You choose whether that creature gets +X/+X or -X/-X when the ability resolves. The value of X is determined by the number of Swamps you control when the ability resolves.