Boundary
"You can make it hatch?" said Aldrich. "That's interesting. I would have thought your powers wouldn't be able to interact with it so easily, considering it isn't from Elduin."
"Yes, but there is something else here that is from Elduin, is there not?" The Death Lord turned to Aldrich and tapped the bone of his sternum with her pipe. Underneath his ribcage, his dark purple Phylactery was barely visible, surrounding by his passively generated aura of green energy.
"Me?" said Aldrich.
"Yes, my dear, you. Through my link with you, I can sense what is going on to a degree," said the Death Lord. "Now then, I am sure you understand some idea of what is happening within your Phylactery, yes?"
Aldrich nodded. To recap, the Chrysalis was essentially incubating inside of his Phylactery. It did so as an adaptive response to mana exposure. Chrysales changed themselves to use the resources around them, and if all that was available was mana, then it would change itself to use it.