Star Of The Void

At-will, std, 1 soul shard; you conjure a mote of pure void, which annihilates everything it touches.

Each round, as a standard action, you can command it to attack a single target within range (spellcasting ability score vs Dex), causing heavy disintegration damage if it hits.

When you wish to end the spell, you must spend a standard action and defeat the spell's DC with a Charisma check. On failure, it does not go away, and if you fail by 10 or more, it attacks whoever it pleases. Each time the star strikes for damage, its DC increases by 1.