Arria, Glory Seeker

Vigilance
At the beginning of your upkeep, reveal the top
card of your library and put that card into your
hand. You lose X life and Arria gets +X/+0
where X is that card's mana value. Arria gains
double strike until end of turn if that card's mana
value is even. Arria gains menace if that card's
mana value is odd.