Everything Else — Riftbound Rules

Section 191 — 19 rules

191.1.: When a player Plays, Hides, or Creates a Card or other Game Object, they are established as that Game Object's Controller.
191.2.: For Spells, they are the Spell's Controller.
191.2.a.: That player chooses targets.
191.2.b.: That player chooses modes.
191.2.c.: That player pays costs.
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.
191.4.: For Abilities, they are the Ability’s Controller.
191.4.a.: By default, the Controller of an Ability’s Source is the Controller of that Ability.
191.4.a.1.: If an Ability’s Source is located in a non-Board Zone, the Ability’s Controller is the Owner of the Source.
191.4.b.: Changes to Control of an Ability’s Source do not change Control of that Ability.
191.4.c.: That player chooses targets.
191.4.d.: That player chooses modes.
191.4.e.: That player pays costs.
192.: When a game effect or rules text refers to the Controller of a specific object, it can be referring to either context interchangeably.
192.1.: The method of assignment of control is different, but the status of Control is the same across all Game Objects.