Inferno

The Inferno is a combat minigame similar to fashion to the TzHaar Fight Caves that was added to Old School Runescape on the 1st of June 2017, along with an update to the city of Mor Ul Rek.

In order to access the Inferno, players must give TzHaar-Ket-Keh a fire cape. This is a one-time fee, so after giving a fire cape to him, TzHaar-Ket-Keh will allow players to enter as much as they want. It should be noted that Purple sweets cannot be consumed in the Inferno.

According to TzHaar-Ket-Keh, he explains that the Inferno was originally a large incubation pool for newly hatched TzHaar to regain memories of their ancestors. The TzHaar found out that the deeper they placed the eggs, the TzHaar emerging from them would gain memories and knowledge of their old ancestors. Unfortunately, they went too far and completely drained the lava, finding an ancient incubation chamber. They decided to place eggs in there, but it completely backfired and caused the creation of new, volatile TzHaar creatures that were extremely aggressive and fought for dominance. The TzHaar struggle against these new monsters and are hesitant to allow JalYt to tackle them.

"Far beneath Karamja, found at the heart of the volcanic city of Mor Ul Rek, lies the Inferno. Do you have what it takes to defeat TzKal-Zuk?"

- Official description .

It is confirmed that logging out during waves will save your progress similar to the fight caves.

Monsters
There are new monsters encountered in the Inferno. Several of these monsters are similar to Fight Caves counterpart, while others are completely new.

Wave Breakdown
Each wave displays which monster (by level) will spawn. There are 69 waves in total. From waves 1 to 66 are three pillars which the Jal-Nibs attempt to destroy. Any remaining pillars by the end of wave 66 are automatically destroyed by the start of wave 67.

Rewards
Players who defeat TzKal-Zuk will be awarded the Infernal Cape. Tokkul is also given, with increasing amounts based on the wave you were defeated on (32,880 Tokkul when you defeat TzKal-Zuk).

There is also a chance of obtaining the Jal-nib-rek after defeating TzKal-Zuk.

Trivia

 * Upon release, Jagex started a competition where the first three players to obtain an Infernal cape would be rewarded. The first player to obtain it would get a real-life version of the Infernal cape, a RuneFest 2017 ticket & travel, and lifetime membership. The second player would get the same as the first player barring the real-life Infernal cape. The third player would get a RuneFest 2017 ticket and lifetime membership.
 * Woox was the first player to complete the Inferno, two days after it was released.
 * Kelvino was the second player to complete the Inferno.
 * Cpl Erik was the third player to complete the Inferno.