Flying, lifelink
Sacrifice a creature: Put X +1/+1 counters on Vish Kal, Blood Arbiter, where X is the sacrificed creature's power.
Remove all +1/+1 counters from Vish Kal: Target creature gets -1/-1 until end of turn for each +1/+1 counter removed this way.
Use the sacrificed creature's power as it last existed on the battlefield to determine how many +1/+1 counters to put on Vish Kal.
Vish Kal's last ability doesn't deal damage. It doesn't cause you to gain any life from its lifelink ability.