Rune Detonation

“Sholdn’t have brought greek fire with you, mate.” - A rogue wizard before detonating an alchemical trap

4th Level Evocation

Classes: Wizard, Sorcerer, Artificer
Casting Time: 1 action
Range: 120 feet
Components: V, S, M (a small piece of charred parchment or ash from a magical explosion)
Duration: Instantaneous

Description:

You invoke the dormant magic within a magical trap, alchemical concoction, or stored spell, causing it to detonate remotely. Choose a magical trap or prepared effect, such as a glyph of warding, explosive rune, or a similar magic or alchemical item that you have seen or studied within the last 24 hours. The trap must be within range and you must have knowledge of its triggering mechanism.

Make an Arcana check to activate the trap. The DC is determined by the complexity or strength of the trap (usually set by the creator’s spell save DC or the alchemical concoction’s potency). On a success, the trap triggers instantly, as if you were the one to activate it, causing it to explode or release its effects.

The detonation is accompanied by a burst of magical energy or an alchemical explosion, depending on the nature of the trap. You do not need to be physically close to the trap when it detonates, but you do need to have a clear mental link to it based on your previous observation.

At Higher Levels:

When you cast this spell using a spell slot of 5th level or higher, the range of the spell increases by 30 feet for each slot level above 3rd. Additionally, you gain advantage on the Arcana check to activate the trap if you cast the spell using a spell slot of 5th level or higher.