Aragorn, the Dunadin

Aragorn, the Dunadin enters the battlefield with
X +1/+1 counters on it, where X is equal to the greatest power among creatures you control.
When Aragorn, the Dunadin enters the battlefield, draw cards equal to its power.
I am Aragorn son of Arathorn, and am called Elessar, the Elfstone, Dúnadan, the heir of Isildur Elendil's son of Gondor. Here is the sword that was broken and is forged again!