Infestor

Burrow (This unit can gain Cloak and Supporter or loss Cloak and Supporter instead of attacking.)
{p/b}: Gain control of target unit an opponent controls with total cost of 3 or less. You may only control 1 unit at a time this way. The opponent regains their unit if the infester dies or you dismiss it.
"Even if you survive, you will never live it down."
- A Dominion marine