Tombs of Amascut - OSRS Wiki
oldschool.runescape.wiki › w › ToaThe Tombs of Amascut makes use of the invocation system, which allows players to customise the difficulty of the raid by choosing to enable various invocations, setting a Raid Level which adjusts the stats of NPCs within the raid; for every 5 raid levels, an NPC's hitpoints, defence, accuracy, and damage are increased by 2% additively, with damage capping out at +150%.