When Kai'sa Evolutionary conquers a battlefield and triggers her ability to play a spell, does she play that spell immediately before a new showdown begins (even if the spell is not Action or Reaction speed)?

Ruling: When Kai'sa Evolutionary conquers and triggers her ability, the spell she selects is played immediately before any new showdown would start, regardless of the spell's normal timing restrictions.

Sequence:

• Kai'sa Evolutionary conquers a battlefield
• Her conquering trigger goes onto the chain
• The trigger resolves and she plays the selected spell
• The game must return to a neutral open state before a new showdown can begin
• Any new showdown then starts

Nuances:

• The spell played by Kai'sa's ability does not need to adhere to the normal timing restrictions (Action/Reaction speed) of the targeted spell
• There is no official term for a "pending showdown" - it's simply that a new showdown cannot begin until the game is in a neutral open state