Nightlurch Stalker

Flying, Haste
When Nightlurch Stalker deals combat damage to a player, put a +1/+1 counter on it.
{b}, Remove all +1/+1 counters from Nightlurch Stalker: Transform Nightlurch Stalker. You may do this instead of Nightlurch Stalker mana cost.
Cycling {1}{b}{b}/{x}{b}
If you cycle {x}{b}, target creature gets -X/-X, target player loses X life and you gain X life.
If you cycle {1}{b}{b}, put lifelink counters on three target creature. This gains Madness {2}{b}.