Planesphere

{t}: Add {x} mana of any colors to your mana pool, where {x} is the number of Planeswalkers you control.
{2}{t}: Gain control of target Planeswalker. The owner of that Planeswalker may pay {3} at any time to regain control of the Planeswalker. When you lose control of the Planeswalker, it loses 4 Loyalty Counters.