Ally Encampment — ruling 1

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.

Ally Encampment — ruling 2

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

Ally Encampment : règles, fonctionnement et interactions (MTG)

Ally Encampment is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

: Add . : Add one mana of any color. Spend this mana only to cast an Ally spell. , , Sacrifice this land: Return target Ally you control to its owner's hand.

How it works : Ally Encampment

Original English text — Wizards of the Coast / Scryfall

#1August 25, 2015· Wizards of the Coast
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.
No other card is named in this ruling.
#2August 25, 2015· Wizards of the Coast
The last ability can only target an Ally on the battlefield.
No other card is named in this ruling.