Dr. Worm

When Dr. Worm enters the battlefield, create a 3/3 worm creature token.
{t}{5}, Create three 5/5 Worm Creature Tokens
{0}, regenerate Dr. Worm
{t}{x}, Create {x} 10/10 Worm Creature Tokens
I'm the creator of worms, yeah, I'm the creator of worms.