The egg of the Phoenix and heart Phoenix. (Divinity: Original Sin 2)

The King Of The World
It seems like just eat to gain skills (if the elf is eating a heart, then you will get a skill the flames, and the egg gives the jump of the Phoenix)

xVitaminx
And until recently, I was hoping for a manual of the Phoenix...

After beating the game in one of the endings on the ship there is a chicken.