8th level Necromancy
Classes: Sorcerer, Wizard
Domains: Destruction, Generic, Planes
Components: V, S, M (a black gemstone of any kind worth 50 gp)
Casting Time: Standard
Range: 60 ft
Effect: 1-foot diameter sphere
Duration: 1 minute (D)
Saving Throw: Con negates
Spell Resistance: Yes
Description: You create a small weightless sphere of pure void. As a move action, you can move it up to 30 feet per round in any direction. If it enters a space with a living creature, it stops moving for the round and that creature gains one HD worth of life drain (Con negates). Any creature passing through or ending its turn in the space occupied by the sphere also gains life drain.
If more than one orb (from different castings of the spell) enters the same space, the orbs automatically fuse together. The resulting orb uses the higher of the two orbs' DCs as its DC and whichever duration has more time left. If the orbs are from different casters, each must make an opposed spell attack to move the sphere.
An undead creature that passes through or ends its turn in the space occupied by the orb gains 2d4 × 5 temporary hit points for 1 hour.