Zhao Jian, Boistrous Taskmage

At the beginning of your upkeep, look at the top
card of your library. You may put it into your graveyard.
Whenever Zhao Jian attacks, he gets +X/+X
until end of turn, where X is the number of
instant and sorcery cards in your graveyard.
"A typical mage uses trickery and illusion to achieve bloodless victory. I, meanwhile, prefer to have fun."