The Hero's and witches both carry the idea of a regenerating, endless troop, my troop takes that concept and first brings it to the air, and second, takes it to a single battle instead of eternity.

The Phoenix is a flying troop, and is immortal until killed by defenses. Let me explain, the Phoenix goes through a 30 second lifespan, where it attacks any structure, at the end of the 30 seconds, it explodes into a rage spell, and is reborn and appears where you first dropped it, and continues attacking with full health. If killed before the end of the 30 seconds, the Phoenix does not regenerate. To clear up:
30 second lifespan
End of 30 seconds drops a rage spell
Regenerates with full health unless killed

Rough stats:
Hp: not tankish, but can survive. Similar to a ballon
Dps: if it's immortal with a rage spell the dps will stay low to keep from op, 50-100,single target
Housing space: 20 like a drag.

Strategy: on offense, this can be used with a lava hound ballon attack, with defenses gone it's a great clean up troop. It works well with balloons as loons need a rage. The difficulty is controlling rage spell placement.
Defense: in a cc, the Phoenix will regenerate from the cc, the rage will work for other units in cc, but with single target damage a drag is a better choice.

In the suggestions for troop creation, it says to stay away from troops that are ragers, if that's the case for this. Then then instead of dropping a rage at the end of the 30 seconds it explodes and does area damage. That explosion will be rather powerful. I'll edit this post and add graphics and correct if something needs to be changes, but I wanted to get y'all's opinion. I belive this too be an original idea.