: Breathstealer gets +1/-1 until end of turn.

Fen Stalker has fear as long as you control no untapped lands. (It can't be blocked except by artifact creatures and/or black creatures.)

Whenever Lurking Nightstalker attacks, it gets +2/+0 until end of turn.

When Predatory Nightstalker enters the battlefield, you may have target opponent sacrifice a creature.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

, Sacrifice Urborg Panther: Destroy target creature blocking Urborg Panther.

Sacrifice a creature named Feral Shadow, a creature named Breathstealer, and Urborg Panther: Search your library for a card named Spirit of the Night, put that card onto the battlefield, then shuffle.