When multiple triggered abilities trigger simultaneously from the same event, they don't all just pile onto the stack randomly. The rules specify a precise ordering process governed by CR 603.3b and 101.4.
First, the active player (the player whose turn it is) puts all of their simultaneously triggered abilities on the stack in whatever order they choose. Then, proceeding in turn order, each other player does the same for their own triggered abilities. The last player to place triggers ends up with their abilities on top of the stack, meaning they'll resolve first.
If a single player controls multiple triggered abilities from the same event, that player chooses the order in which those abilities are placed on the stack — and since the last one placed is on top, it resolves first. This ordering choice can be strategically significant.
Example: It's your turn (you are the active player). When a creature enters the battlefield, both you and your opponent have triggered abilities that fire. You put your trigger on the stack first, then your opponent puts theirs on top. Your opponent's trigger resolves first, then yours.
Note that this process applies to triggers going on the stack at the same time. If triggers arise at different points (e.g., one trigger creates another trigger), each new trigger waits for the next time a player would receive priority to be placed on the stack, following the same turn-order process (CR 603.3, 603.3b).
Unofficial fan resource — not affiliated with or endorsed by Wizards of the Coast. Answers are AI-generated estimates grounded in the Comprehensive Rules and are not a substitute for an official judge. Verify anything match-critical.