Liliana of the Dark Realms

Oracle Text

+1: Search your library for a Swamp card, reveal it, and put it into your hand. Then shuffle your library.

−3: Target creature gets +X/+X or -X/-X until end of turn, where X is the number of Swamps you control.

−6: You get an emblem with "Swamps you control have ‘T: Add BBBB.'"

Card Rulings

7/1/2012 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.
7/1/2012 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.
7/1/2012 Liliana’s emblem doesn’t remove any other abilities of Swamps you control.
7/1/2013 Each of Liliana’s abilities refers to lands (or land cards) with the subtype Swamp, not just ones named Swamp.