Fire trap

Any closeable item can be warded by a fire trap spell. The spell is centered on a point selected by the spellcaster. The item so trapped cannot have a second closure or warding spell placed upon it. The caster can use the trapped object without discharging it, as can any individual to whom the spell was specifically attuned when cast.

When the trap is discharged, there will be an explosion of 5-foot radius from the spell's center. All creatures within this area are subject to being damaged. The item trapped is not harmed by this explosion.