When a card resolves from the chain and draws you a card, can you immediately play that card as a reaction before the next item on the chain resolves?

Ruling: Yes, when an item resolves from the chain, the controller of the next item on the chain gains priority. If you draw a reaction card during resolution, you can play it before the next item resolves.

Sequence:

• Both players pass consecutively, causing the last item on the chain to resolve
• No additional passes are needed during resolution
• Once an item resolves, the controller of the next item on the chain gains priority
• The player with priority can play reactions (including newly drawn cards)
• Players continue passing priority until both pass consecutively, then the next item resolves

Nuances:

• You can play reaction spells both before and after triggered abilities resolve on the chain
• The player who controls the most recent item on the chain has priority first