Stalactite Stalker (LCI-122) - The Lost Caverns of Ixalan

Menace
At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature. (You descended if a permanent card was put into your graveyard from anywhere.)
{2}, Sacrifice this creature: Target creature gets -X/-X until end of turn, where X is this creature's power.