M.A.V.I.S.

{u}: M.A.V.I.S. gains Hexproof until end of turn
{r}: M.A.V.I.S. gains First Strike until end of turn
{u/r}, Sacrifice target artifact you control: Put
a +1/+1 counter on M.A.V.I.S. Use this ability
only when you could cast a sorcery.
"I am the Murderous Automaton for Various
Inter-guild Services"
- M.A.V.I.S.