Sallos Allotes

Flying, hexproof
When Sallos Alloces or another creature enters the battlefield, you may attach it to another target creature.
Creatures attached to Sallos Alloces have "At the beginning of your upkeep, you lose life equal to this creature's power or sacrifice this creature. At the beginning of your end step, put a -1/-1 counter on this creature."
"Do not fret, my child. Defiance and pain are merely temporary, obedience lasts forever. Let us not postpone the inevitable."