Fizz, Trickster

Q: Is the recycle ability of <<Fizz Trickster>> and <<Kai’sa Evolutionary>> a delayed replacement effect or a delayed triggered ability?

Rules for Context - 390.2., 390.3.

A: Delayed replacement effect.

Specifically, Fizz and Kai’Sa’s delayed replacement effect is the equivalent of “if that spell would leave the chain for any reason, recycle it instead.”