Rengar, the Pridestalker

First Strike, Haste

Bonetooth Necklace - Whenever a creature dies that was damaged by Rengar this turn, put a tooth counter on Rengar. The first time this happens each turn, untap Rengar.

{r/g}{t}: Rengar fights target creature an opponent controls.

If Rengar has five or more tooth counters on him, he gains +5/+5.