OSRS Boss Gear & Inventories

Kurask

Combat level 106 · 97 hitpoints

Fremennik Slayer Dungeon, Iorwerth Dungeon or the Kurask Lair. Their hides make them immune to almost every weapon in the game, which is the entire gear constraint.

Requirements

• 70 Slayer
• Attack 75+ (75+ Str/Def recommended)
• LEAF-BLADED WEAPON, BROAD AMMO OR MAGIC DART, nothing else damages them

Pointers

• THEY ARE IMMUNE TO EVERYTHING except leaf-bladed weapons, broad ammunition (broad bolts / broad arrows) and the Magic Dart spell. A Scythe does nothing.
• Burn damage still applies though. Weapons like burning claws bypass the immunity.
• A leaf-bladed battleaxe is the standard melee answer; broad bolts cover ranged; Magic Dart covers magic.
• They regenerate fast (1 HP every 5 ticks), so slow chip damage genuinely loses ground. Commit to kills.
• They hit with crush every 4 ticks for a max of 11 and are quite inaccurate, so you can often fight without protection prayers and heal with Bones to Peaches.
• Pray Protect from Melee if a superior (King kurask) spawns.

What the sim brings here

Every worn slot and every inventory row below is the combat simulation's own output, at the style it ranks fastest for each account tier. Each line carries the channel that chose it: sim means the model solved it, and inherited means the value came through from the hand-authored loadout the solver starts from. Riding through a generator does not make a value derived, so those are marked rather than presented as the model's answer. A line marked unattributed carries a channel the model's own vocabulary no longer declares, so no word is put on it at all rather than one being read off the channel's spelling. Where the model has not answered a row, its own refusal is printed instead; where it has answered a row it doubts, the answer is printed with the doubt attached rather than withheld.

What each of those badges means

• derived:ascent (sim): an accepted coordinate-ascent move: betterThan() preferred this candidate over the incumbent under the row objective and band. The weapon+ammo+shield pairing and the crystal set arrive here too, because both are offered to the same acceptance test.
• derived:cheapestEqual (sim): cheapestOfEquals(): at budget, an exactly-tied cheaper item replaced the one in this slot. It changes the price and, by construction, not the score.
• derived:composed (sim): balanceInventory() sized this row from the derived supply menu. The menu enumerates CONSUMABLES and narrows by style, tier and price; it is not the authored bag.
• derived:obtainable (sim): canonicaliseObtainable(): the finished loadout named a variant the model cannot state a route to, and this pass swapped it for the obtainable equal.
• derived:seedAmmo (sim): seedAmmoFor(): a weapon that scores nothing bare needs the ammunition that makes it legal to arrive WITH it, so the pair is seeded together off ammoListFor.
• derived:voidSeed (sim): the Void set offered assembled, because an all-or-nothing set effect pays nothing until four slots are right and every single step toward it is a strict loss. The pieces come from VOID_SET in combat.js, the same names its own predicate tests.
• ruled:escape (ruled): escapeLeg(): the way OUT, taken from the typed per-tier table ESCAPE_PLAN and judged against the account, with nothing substituted and no fallback ladder. The ACCOUNT CHECK is a derivation; the CHOICE of item is not, so this is not a `derived:` channel. ESCAPE_PLAN carries no attributedTo field (PROVENANCE_BACKLOG: silent-and-unattributed), so this channel does not claim one either.

Kurask strategies on the OSRS Wiki