Darwin, Elemental Archmage

Flying, Hexproof
This creature gains lifelink if you have 5 or more
non-token creatures in your battlefield. This
creature gains deathtouch if you have 10 or more
non-token creatures in your battlefield.
{w}{b}{g}: Once per turn create 3 1/1 white human creature tokens
{4}{t}: Sacrifice 3 creature tokens, if you do bring
a creature back from your graveyard and onto
your battlefield