Blood Golem, Project Pet

Companion- Your deck must be 2 colors or less.
If Blood Golem, Pet Project would be dealt
combat damage, reduce it by 1 for each
creature you control with a +1/+1 counter on it.
{p/b}{p/c}{t}: Regenerate target legendary creature,
put up to one +1/+1 counter on that creature.
{p/b}{p/c}{ut}: Amass 2.