Dezi'sOSRS BOSS
TRAINER Encounter selection
4 online · 2 beta · 2 prototypes

Choose your encounter

Old School RuneScape Boss Trainer

Practice Old School RuneScape bosses in your browser. Train prayer switches, movement and timing against Sol, Zuk, Wardens, Doom, Verzik, Olm, Jad and Xarpus.

Desktop & landscape mobile
Fortis ColosseumOnline
Sol Heredit in golden armour with his spear and shield
Final waveThe Colosseum's champion

Sol Heredit

Melee

Find your footing against shields, spears, and the triple parry.

  • Shields & spears
  • Triple parry
  • Solar Flare
Enter Colosseum
Mor Ul RekOnline
TzKal-Zuk rising from the lava
Waves 1–69Face the Inferno

The Inferno

Ranged

Master the waves or head straight to Zuk and follow the shield.

  • Custom waves
  • Jad & healers
  • Zuk sets
Challenge ZukAll waves
Tombs of AmascutOnline
Tumeken’s enraged Warden, with its golden armour and red core
Last rowA final stand against the gods

Wardens

Ranged

Hold the last row. Dodge lightning and boulders while keeping Zebak’s prayers covered.

  • Lightning timing
  • Prayer switches
  • 3D camera
Enter the last rowMultiplayer
VarlamoreOnline
Doom of Mokhaiotl with its red armoured pincers
Wave 8Descend into Mokhaiotl

Doom of Mokhaiotl

Waves 1–8

Practice waves 1–8, or jump straight to Wave 8.

  • Double boulders
  • Shield & larvae
  • Acid & orbs
Try Wave 8 All waves
Theatre of BloodBeta
Verzik Vitur in her final spider form
Phases 2 & 3Master Verzik’s mechanics

Verzik Vitur

P2 footwork · P3 full fight

Practice P2 mechanics, P3 tanking or the full P3 special cycle with webs and tornadoes.

  • P2 & P3 practice
  • Scythe movement
  • Webs & tornadoes
Practice P2 FootworkPractice P3 Tanking
Fight CavesBeta
TzTok-Jad, the red four-legged guardian of the Fight Caves
Wave 63Earn your fire cape

TzTok-Jad

Prayers & healers

Read the stomp and raised forelegs. Keep your prayers covered while you tag the four healers.

  • Prayer switches
  • Healer tagging
  • Attack cues
Challenge Jad
Chambers of XericPrototype
Great Olm with its pale head and claws
Solo encounterEnter Olm’s chamber

Great Olm

Hands & head

Prepare outside, pass the barrier and practice Olm with the familiar movement and camera controls.

  • Hand running
  • Prayers & specials
  • Head phase
Enter the chamber
Theatre of BloodPrototype
Xarpus with his broad wings raised
Solo encounterWatch the Yarasa King

Xarpus

Melee & ranged

Block the exhumeds, bait poison onto clean tiles, and keep attacking while he looks away.

  • Exhumed blocking
  • Melee tile markers
  • Screech timing
Practice Xarpus
Yama's DomainOffline
Yama
Phase threeMaster of Pacts

Yama

Unavailable

This encounter is temporarily offline while development is on hold.

Available again when development resumes.

In the arena

Click / tap Move / attack

Middle-drag / touch-drag Rotate

Scroll / pinch Zoom

Right-click / hold Tile options

Solo sims pause when you switch windows

For better performance: enable hardware acceleration in your browser.