Army of Planeswalkers

{t}: Remove a Loyalty Counter from target Planeswalker. Add a Loyalty Counter to target Planeswalker.
{4}, {t}: Sacrifice a Planeswalker. If you do, you
can play a Planeswalker from your hand without
paying it mana cost.
{10}, {t}: Sacrifice Army of Planeswalkers. Double
all the Loyalty Counters on all Planeswalker's you control.