The adventure I am running has the following trap:
Continuous Magic Missile Trap: CR 5; Proximity trigger; automatic reset; 3d4+3 damage automatically, each round, no save; Search DC 29; Disable Device DC 29
The player find the trap and then cast Dispel Magic on the area.
There are no rules I can find for if this should work. The player rolled very high on Dispel Check, as I guesstimate that the Caster Level was about 8.
Are there any real rules and can you do this with Dispel Magic?
Dispel Magic states
You can use dispel magic to end ongoing spells that have been cast on a creature or object, to temporarily suppress the magical abilities of a magic item, to end ongoing spells (or at least their effects) within an area, or to counter another spellcaster’s spell.
A magic trap is not an ongoing spell, which would be a continuous effect or maybe triggering once for a single effect. It is more like a magic item, a permanent magical creation.
The Player’s Handbook Sidebar on page 73 says:
Magic Traps: Dispel magic helps here. Someone who succeeds on a caster level check against the level of the trap’s creator suppresses the trap for 1d4 rounds. This works only with a targeted dispel magic, not the area version.
You would be able to suppress the trap for 1d4 rounds if your check is successful.
