Chromium
Chromium{2}{W}{W}{U}{U}{B}{B}

Legendary Creature — Elder Dragon

Flying

Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)

At the beginning of your upkeep, sacrifice Chromium unless you pay {W}{U}{B}.

7/7

Illustrated By Edward P. Beard, Jr.