If 2 Auroras are activating at the same time and the first Aurora triggers playing a Dead Bloom, does a showdown happen before the second Aurora triggers?

Ruling: No, the showdown does not happen before the second Aurora triggers. The combat is staged because it cannot begin while items are still on the chain. The second Aurora will resolve, and then when the chain is empty the showdown will begin.

Sequence:

• First Aurora resolves and triggers Dead Bloom
• Combat is staged (cannot begin yet)
• Second Aurora resolves
• Chain becomes empty
• Showdown begins

Nuances:

• You cannot start a showdown while the game is in a closed state, which occurs when there are still items on the chain
• If multiple combats are staged this way, the turn player will choose which to resolve first