Owen, Haunted Warlock

When Owen, Haunted Warlock enters the battlefield, draw X cards, where X is the number of dragons you control.

{2}{b}{r}: Create a 4/4 dragon creature token with
flying

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield
under its owner's control with a -1/-1 counter on it.)