You already know the room. The creature is the constant. You are the variable.
Third floor. Not a pit scorpion.
Slayer · RuneScape
Where
Stronghold of Security — Pit of Pestilence
Assigned by RuneScape slayer masters. The live page lists who.
Hunt
Third floor. Poison. Pit scorpions under the Legends’ Guild are a different file.
Watch
Task-only doors, face covers, and cannon-blocks are on the live page. Confirm on the wiki.
Kill
A kill ends when scorpion drops. Walk the room if you pulled extras. Reset at the door when the task is done. Wrong prayer or the wrong tile is the wipe. That is the whole file. Do not treat this as an enrage boss. Those sheets live under Bosses. Counts, drops, and the living method: the RuneScape wiki for this hour.