Littlefinger's Machinations

Whenever you cast a spell during an opponent's
turn, put a plot counter on Littlefinger's
Machinations.
Remove three plot counters from Littlefinger's
Machinations and sacrifice it: Gain control of
target tapped creature an opponent controls.
"Always keep your foes confused, if they don't know
who you are, what you want, they can't know what
you plan to do next." ~ Petyr Baelish