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376.3. When a Condition is met, a Triggered Ability behaves like an Activated Ability and is placed on the Chain.
376.3.a. Triggered Abilities can be put on the Chain during Closed States or Open States on any player's turn.
376.3.b. If more than one Triggered Ability is Triggered simultaneously, then the player that controls the Abilities selects the order to place them on the Chain.
376.3.b.1. If multiple players separately control Triggered Abilities that are Triggered simultaneously, then starting with the Turn Player and proceeding in Turn Order , each player orders their Triggered Abilities on the Chain.