Upon entering the boss fight, players will face Arbaziloth, two Overcharged Demons, and The Forgemaster.

The Forgemaster, as mentioned before, is there so players can decide which kind of fight they will face, while the demons are summons that will keep on respawning as they die, however, note that killing them will heal Arbaziloth, so two common strategies are to lure them away in the room and lose their target, or have a player other than the main blocker to tank them.

As players attack Arbaziloth, Imp Minions near him will shoot the slingshot to generate a purple fire field in a random spot in the room. Players should pay attention because even though the boss takes damage, its HP will not go down. Lure the boss over it until the CRAAAACK! sound appears, then use  Fishing Rods on the boss to make him vulnerable again.

It is recommended that all players use their fishing rods, as the boss can dodge the use of the rod. When the boss turns vulnerable, a heart effect appears on it, players lose target, and the boss makes a sound for each turn: first UH? WHAT ... ? HOW... ?, second AHHH! HOW DARE YOU!?, third YOU WILL PAY FOR THIS INSOLENCE!, and last NOOO! AHHHH! THE POWER!!

Each time this process is done, one of the energy spheres is removed from Arbaziloth's arm.

If the team did not kill The Forgemaster during the fight, it will leave the fight shortly after the fourth mechanic is done, and Arbaziloth will heal himself fully.

At this point, no mechanics are left, and players need to attack him until he dies. Note that the boss will deal more damage in this phase.

In case The Forgemaster dies during the boss fight, Arbaziloth will not heal himself, and the Doomforge will not be accessible.

Reward:

Chance to loot Inferniarch weapons, and after the first time defeating Arbaziloth, you will receive the base Fiend Slayer Outfit.