You searched for corpse explosion
1. corpse explosion
Syntax: cast 'corpse explosion' (<npc corpse>)
Corpse explosion is a powerful Necromancer spell cast upon the corpse of
monsters. Once cast upon the corpse, it is automatically placed into the
room. The next monster that enters the room will set it off and the
Necromancer will be notified and rewarded experience (if the monster is
within level range). If a corpse is made explosive during a battle, the
corpse will automatically explode, harming and possibly dazing all
attackable mobs in the room. The damage is based on the corpse's level, the
Necromancer's level, and the constitution of the Necromancer. Damage
against PK players is halved. This spell will not affect peaceful players
or pets.
There can be a max of 5 corpses in the room at a time. An (X) or
(Explosive) flag will appear next to the object if this spell has been cast
on it. Normally a corpse will crumble within 3‑6 minutes, the preserve
spell will prevent this from happening.