Azrael, Jhessian Assassin

Exalted(whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
Azrael has hexproof as long as it's untapped.
At the beginning of combat on your turn, create a 2/2 blue Infiltrator token with exalted and "Sacrifice this creature: target creature is unblockable this turn."