Does Zhonya's prevent Phoenix from triggering when a unit would die?

Ruling: Zhonya's prevents Phoenix from triggering because Zhonya's replaces death, so the unit never actually died.

Nuances:

• This applies regardless of whether the kill effect is direct removal (like Blade) or damage-based (like Hextech Ray)
• Phoenix requires the unit to actually die to trigger
• This works similarly to how Hook interacts with death prevention effects