Rule 191.3
For Permanents and Runes, when they Enter the Board, that player is assigned as that Game Object's Controller.
- 191.3.a That player may make decisions about the Game Object's Inherent Abilities.
- 191.3.b That player may make decisions about the Game Object's Unique Abilities.
- 191.3.c That player may make decisions about any game effects or decisions necessary while the card is being played.
- 191.3.d That player may make decisions about any game effects created from "When you play me" effects of Permanents.