Similar. They create Fragmentum--best way to put it is they summon monsters.

[ or 'curses' if he knew what a curse was yet!!! that might have been helpful. ]

They also warp people's minds. They promise to grant their wishes, but only at a great cost. Stellarons need to be sealed or else they'll destroy any world they attach to.

[ ....to reiterate: ]

The one inside me is safe. Like I said, I was made to hold it.