When a trigger ability activates during a chain (specifically Fizz being played via Here to Help in response to an opponent's spell), does it resolve immediately within the current chain or does it wait to start a new chain after the current one resolves?

Ruling: Trigger abilities resolve immediately within the current chain. When Fizz is played during a chain, its triggered ability resolves before earlier items in the chain (like the opponent's spell that started it). There is only one chain at a time.

Sequence:

• Opponent activates a spell (chain starts)
• You activate Here to Help in reaction
• You play Fizz from hand
• Fizz's trigger ability activates and resolves immediately
• Any spell Fizz plays from trash is added to the chain
• That spell resolves
• Finally, the opponent's original spell resolves

Nuances:

• When an effect says to "play a card," you ignore timing restrictions, allowing action-speed spells to be played during a chain