Ophelia, War Machine

Powered (This creature gets +1/+1 for every third
energy counter.)
Whenever Ophelia, War Machine enters the battlefield under your control, and at the
beginning of your upkeep, you get {e}{e}{e} (three
energy counters).
Spend {e}{e}{e}{e}{e}{e}{e}, all non-Rusalki creatures
you control get indestructible until end of turn.