Kiga, Vengeful Wanderer

Whenever another creature dies, put a +1/+1 counter on Kiga.
During your upkeep, if Kiga doesn't have more +1/+1 counters on it than it had during your last upkeep, you lose five life. If you lost life this
way, put a +1/+1 counter on Kiga.
{c}{c}{c}, Remove six +1/+1 counters from Kiga: Transform Kiga.