Can Immortal Phoenix be played to a battlefield location during combat, and does it trigger from combat deaths?

Ruling: Immortal Phoenix can only be played to any location you control (including a battlefield if you control it), but it does not trigger from units dying in combat - only from killing something with a spell.

Sequence:

• Kill something with a spell (not combat)
• Immortal Phoenix's ability triggers
• Play Phoenix to any valid location you control
• If you control the battlefield (e.g., you're defending), you can play it there

Nuances:

• If you have multiple Immortal Phoenix cards in the trash and kill something with a spell, you can play all of them out together