The Gliding Death, Brachion

Flying, lifelink, deathtouch.
Delirium -- If there are four or more card types in your graveyard, other dragon creatures you control get a +3/+3 counter and your choice of lifelink or deathtouch until The Gliding Death, Brachion, leaves the battlefield.
{4}{p/b}{p/g}: Regenerate The Gliding Death, Brachion.