Melissa, Planar Skulker

Whenever another creature enters the battlefield,
you get an loyalist counter. At the beginning of
each end step, if you have ten or more loyalist counters, transform Melissa, Planar Skulker.
•{r}{r}, remove two loyalist counter: put a loyalty
counter on target planeswalker or deals 2 to
any target.
•{b}{b}{b}{b}, remove six loyalist counter: destroy
target creature, then draw a card, and lose 3 life.