Haarken Worldclaimer

Haste, Flying.
Other Chaos Creatures get's +1/+1.
If Haarken Worldclaimer destroy any Legendary creature, then Haarken Worldclaimer get +3/+0.
Escape—{2}{u}{b}{r}. Exile four other cards
from your Graveyard.
Haarken Worldclaimer escapes with two
+1/+1 counters on it.