Shadow Stalker,Tenno Killer

Deathtouch, Lifelink, Changeling(This creature is every type.)
Whenever you cast a spell, put a +1/+1 counter on Shadow Stalker,Tenno Killer for each of that spell’s colors.
Remove five +1/+1 counters from Shadow Stalker:
Add {b}{b}{w}{w}{r} Activate this ability only once each turn.