Beskrivelse
Mechanical Trap (level 5-10, dangerous threat)
The big sister of the Crossbow Trap. Typically, ballistae are used to attack or defend castles, so anyone placing one indoors is either expecting serious trouble, or is wildly eccentric. Since a ballista is much harder to conceal than a crossbow, this trap is usually hidden behind a door, and can often shoot straight through it.
Trigger. A creature that opens a trapped door triggers the trap.
Effect. The trap makes an attack against the triggering creature. The attack has a +8 attack bonus and deals 16 (3d10) piercing damage on a hit. This attack can't gain advantage or disadvantage.
Countermeasures. A successful DC 15 Wisdom (Perception) check reveals a mechanism attached to the door. A successful DC 15 Desxterity check using thieves tools disables the trip wire, and a check with a total of 5 or lower triggers the trap.