Loki, God of Mischief

Flying, flash. If an opponent would take control
of Loki, shuffle him into owner's library.
{t}: Tap target creature or artifact. Gains +1/+1.
{t}: Target creature you control gains +0/+2 until
end of turn.
{t}: Opponent discards a card of your choice.
Gains -1/-2.
{u}{g}: Can't be blocked this turn.
Hitting doesn't solve everything.