Ally Encampment

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast an Ally spell.
{1}, {T}, Sacrifice Ally Encampment: Return target Ally you control to its owner's hand.

Battle for Zendikar

{T}: Add {1} to your mana pool.{T}: Add one mana of any color to your mana pool. Spend this mana only to cast an Ally spell.{1}, {T}, Sacrifice Ally Encampment: Return target Ally you control to its owner's hand.

Battle for Zendikar Promos

An “Ally spell” is any spell with the subtype Ally. Mana produced by the second ability can’t be spent to pay the costs of abilities of Allies you control.

The last ability can only target an Ally on the battlefield.