Smaug, The Golden

In your upkeep, put a Hunger Counter on Smaug. Then, if he has four or more, remove them and Smaug fights a Dwarf creature at random.

Hexproof, First Strike, The Lonely Mountain Defender.

Smaug will block at least two creatures attacking
The Lonely Mountain, choosing them at random.
If The Lonely Mountain is destroyed, exile Smaug.