Torms Golden Cage

You create three glowing missiles of radiant force. Each trajectile hits a creature of your choice that you can see within range dealing 1d4 radiant damage to its target. The missiles all strike simultaneously, and you must choose seperate targets. 

If the target is undead, the target must make a Dexterity saving throw against the caster's spell-save DC, or be locked within a cage of radiant light. The target can make a Consitutation saving throw against the caster's spell-save DC at the start of each of it's turns to break free of the cage. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the spell creates one more dart for each slot level above 2nd