Xanita, Inverse Protector

All players have shroud.
All damage sources have wither.
Whenever non-combat damage is dealt to a player, Xanita deals damage equal to the amount of damage dealt to that player to each creature
the controller of that source of damage controls.
Whenever a permanent is put into a graveyard from the battlefield, its controller loses life
equal to the number of counters on it before it left the battlefield.