If my opponent plays Bone Skewer to play my Fizz to their battlefield with Teemo Strategist, and my Fizz play effect chooses Ride the Wind, what happens first: the play effect from Fizz or Teemo Strategist defend trigger?

In this scenario, the Fizz, Trickster "When you play me" (WYPM) ability will resolve before the Teemo, Strategist "When I defend" triggered ability.

The Sequence of Events

1. Playing Bone Skewer: Your opponent plays Bone Skewer, choosing the battlefield where Teemo, Strategist is present.
2. Fizz Enters Play: Bone Skewer resolves, and your Fizz, Trickster is played to that battlefield.
   • Fizz is now "in play."
3. Triggers are placed on the chain:
   • Fizz's "When you play me" ability: Triggers because he entered play. This ability is added to the chain, and the target spell in your trash (Ride the Wind) is chosen during this finalization phase (as clarified in RiftJudge FAQ #10020).
   • Teemo's "When I defend" ability: This triggers when Teemo gains the "defender" designation during the combat showdown step.
4. Chain Resolution (LIFO): The chain resolves in Last-In, First-Out (LIFO) order.
   • Fizz's ability resolves: You proceed to play Ride the Wind from your trash (paying its power cost, but ignoring its energy cost). The spell then becomes a new item on the chain and will resolve subsequently.
   • Teemo's ability resolves: Per the Combat Showdown flow, the "When I defend" trigger resolves after the entry triggers have cleared, allowing Teemo to reveal the top 5 cards and deal damage to Fizz based on the number of [Hidden] cards revealed.

Summary of Key Rulings

• Targeting Timing: Per RiftJudge FAQ #10966 and FAQ #10020, targeting for both Teemo's defend trigger and Fizz's play effect occurs the moment the ability is placed on the chain (during finalization), not on resolution.
• Resolution Order: Per RiftJudge FAQ #4077, entry/move triggers resolve before the combat showdown begins. Consequently, Fizz’s play effect resolves before Teemo’s "When I defend" trigger.
• Trigger Conditions: Per RiftJudge FAQ #8317 and FAQ #10534, the "When I defend" ability triggers specifically upon gaining the "defender" designation, which occurs during the combat showdown step, after initial entry triggers have resolved.

Note: I could not fully verify this ruling against the retrieved rules.