Arcanist's Succor (Dunamancy)

You summon a duplicate version of yourself from an alternate reality who immediately casts a spell of your choice from your class spell list. Your duplicate uses a 1st level spell slot to cast their spell, and the spell they cast must have a casting time of one action. You must provide any material components required for your duplicate's spell. Material components provided are consumed by the spell, even when the spell normally would not consume the material component. Providing an arcane focus or component pouch as the material component will consume that object. Once the casting is complete, your duplicate and all of their possessions are returned to their own reality. For casters that always cast at the same level, the duplicate you summon is a younger version of yourself who has not yet attained your current slot level.

At Higher Levels. When you cast this spell with a spell slot of 5th level or higher, the slot level used by your duplicate increases by one for every two slot levels above 3rd level.