Who gains priority after a spell resolves from the chain?

Ruling: After an effect resolves from the chain, the owner of the next item on the chain gets priority. If the chain is empty, priority depends on the game state.

Sequence:

• When chain is not empty: Owner of the next effect on chain gets priority
• When chain is empty during a showdown (initial chain resolving): Attacker gets focus and priority
• When chain is empty during a showdown (not initial chain): Next player after the owner of the most recent effect gets focus and priority
• When chain is empty outside showdown: Current turn player gets priority

Nuances:

• Between each item resolving, both players get an opportunity to respond at reaction speed
• If only one player passes (not a double pass), the other player can still respond at reaction speed