When a hidden Permanent is played as a reaction card in a chain, can other players play reaction cards before it resolves?

Ruling: Permanents do not linger on the chain and cannot be reacted to. When a hidden Permanent is played in a chain, it is immediately played and removed from the chain, then priority passes for players to react to other cards in the chain.

Sequence:

• Player plays a card (e.g., Void Seeker) to initiate a chain
• Opponent plays a hidden Permanent (e.g., Zhonya) as a reaction
• The Permanent is immediately played and removed from the chain (placed on the battlefield)
• Priority passes for players to add reactions to the remaining chain
• Players cannot react to the Permanent itself, but can still react to other cards in the chain

Nuances:

• Permanents never pass priority before being played, only after
• You cannot react to a permanent being played
• You can still react to other cards in the chain after a permanent has been played