Mana Spear

4th-level enchantment

Casting Time: 1 action

Range: 150 feet

Components: V, S, M (a spear of any size)

Duration: Instantaneous

You hurl a spear of psychic energy at a creature you can see within range. Make a ranged spell attack. On a hit, the target takes 6d10 psychic damage, and if the target is a spellcaster, it must also make a saving throw using its spellcasting ability score. If this save fails, the target loses the ability to cast spells of 3rd level or lower until the start of your next turn.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, you increase the damage by 1d10 for each slot level above 4th. On a failed saving throw, until the start of your next turn, the target loses the ability to cast spells of a level up to one less than the level of the spell slot you used.