TzHaar Fight Caves

Sixteen waves, no food, and nothing idle about it. Every monster tells you what it is about to throw a moment before it throws it — arm the matching protection and it does nothing at all. The door opens after 250 TzHaar-Ket kills.

Flick it. An armed protection burns prayer every second it is up, and your prayer never comes back — the points you walk in with have to last all sixteen waves. Tap it on for the tell, tap it off again.
No healing. Health does not come back between waves, and not before Jad either.
Pick your target. You cannot block two styles at once, so kill the one you are tanking. Click a monster to switch to it.
Your gear still counts. Waves die at the speed your equipment kills — better gear means fewer attacks to survive.
Beat him once and the TzHaar arm you. From your first clear, TzHaar-Ket starts dropping its obsidian weapons and shield — Toktz-xil-ak, Tzhaar-ket-om and Toktz-ket-xil. Until then it keeps them.

Fight Cave simulator

Never been in? Practise first. Six waves ending in Jad, with a coach that stops the fight to explain each new thing and tells you which protection to press. Start gentle, then switch each setting below to the real caves' numbers as you get better. It pays nothing, needs no TzHaar-Ket kills, and costs one fractured obsidian offering. An Obsidian offering breaks into four of them.

Hit damage
Prayer drain
Warning time
Coach pauses

The door opens for an Obsidian offering, sacrificed on the way in.

Jad drops a Fire cape every time he falls. Throw one into the lava and his pet might answer.