Rovrym, Sovereign Lord

Eminence -- At the beginning of your upkeep, if
Rovrym, Sovereign Lord is in your command
zone, you get {e}.
Whenever you cast a spell or activate an ability
that isn't a mana ability, you get {e}{e}.
{t}, Pay {e}{e}{e}{e}{e}{e}{e}{e}{e}{e}: Gain control of
target permanent.