A Night Terror grows on a random enemy's body, dealing continuous dmg. Night Terror casts Death Bloom with Tartarus.
It will periodically seek a new host.
It cannot be attacked & dies when Tartarus dies.
Each time T's HP drops below 20%, he gets 1 soul fragment (max 4). When enemy hero's soul is extracted, T's soul fragment will control him/her for a time & then steal HP, healing T. While under control, he/she is immune to sleep effects.