Darksteel Legion

Darksteel Legion enters the battlefield with X
+1/+1 counters on it, where X is your devotion
to black. (Each {b} in the mana costs of permanents
you control counts toward your devotion to black.)
When Darksteel Legion dies while it has 7 or
more counters on it, you draw 7 cards and have
no maximum hand size for the rest of the game.