Spell Siphon

7th level enchantment

Casting Time 1 action

Range 240 ft

Components V, S, M

Duration Concentration, up to 1 minute

Developed by the Grand Vizier of the City of Brass to fuel his arcane aspirations, this spell is a much sought-after incantation that is guarded jealously by its creator. If the target fails a Wisdom saving throw, you create a mental link with your target, draining it of your choice of up to 6 1st level, 3 2nd level, 2 3rd level, or 1 4th level spell slot and gaining that amount as bonus spell slots that you use to power your magic. You can store no more than 40 total spell slot levels.

The drain continues each round you maintain concentration while the host remains in range. If you choose to drain spell slots from a level that the target is out of, or never had, you gain no spell slots that round.

As a host is drained, the slots are wiped from its mind just as if they had been cast that day.

You cannot use the bonus slots to cast a spell of a level you couldn’t normally cast. Bonus spell slots remain until you complete a long rest or until expended.