Grievous, Fearsome Warlord

Menace
Whenever General Grievous attacks, you may sacrifice another creature. If you do, put a +1/+1 counter on General Grievous and all other droids you control get +1/+1 until end of turn
{1}{p/b}{p/g}: Sacrifice three Artifact creatures, Grievous phases out until end of turn.

“Cough…”