Combat and raids

Delve (combat raid skill and tree)

The combat raid skill, trained only by dealing damage in Dungeons and the Chaos Dungeon. Its levels gate dungeons and pay for a 120-node combat talent tree.

See it on the systems map

Rules and numbers

dev note Raids grant Delve XP only; no Life, secondary, Spirit or Slay XP is earned in a raid.
Source: Constants.js:875-880
confirmed Delve XP per damage is 0.5 / 0.75 / 1.0 / 1.25 / 1.5 by dungeon tier; Chaos uses its wave band, then 1.75 from wave 101.delveXP = finalDamage * RAID_DELVE_XP_TIER_MULT[tier]
Source: Constants.js:881-886
confirmed A completed Feeble to Ancient run pays 100 / 200 / 300 / 400 / 500 flat Delve XP to each participant.RAID_DELVE_COMPLETION_XP
Source: Constants.js:888-892
confirmed Delve levels to 120 and gates Dire to Ancient (30 / 50 / 70 / 90) and Chaos (20).
Source: Constants.js:39; raids.json
confirmed The Delve tree mirrors Fortify's: 120 nodes (66 small, 36 medium, 18 large), one point per level, 21 nodes gated at 100/110, and 3 reroll credits per refund.
Source: raid-trees.json (delve); Constants.js:264
confirmed Tree cluster totals: Battle Prowess +15 combat skill levels, Cleave +5 min hit, Onslaught +5 max hit, Precision +14.5% crit chance, Savagery +33% crit damage, Swiftness +5% attack speed, Corruption +5%, War Study +10% combat XP, Hunter's Lore +10% Slay XP, Delver's Insight +10% Delve XP, Revelation +10% all XP.
Source: raid-trees.json (delve.clusters)
confirmed skills.json still says Delve XP is half the damage dealt, which only matches Feeble now.
Source: skills.json (delve.description); Constants.js:885

Connected systems

Delve (combat raid skill and tree) is trained in Chaos Dungeon
Delve (combat raid skill and tree) boosts Combat
Delve (combat raid skill and tree) raises Corruption
Delve (combat raid skill and tree) is trained in Dungeons (tiered raids)
Delve (combat raid skill and tree) pairs with for raid loot milestones Luck skill
Delve (combat raid skill and tree) refunds tree nodes with Reroll credits

Arrows show who acts on whom: → this system acts on the other, ← the other acts on this one, ↔ both do.

More in Combat and raids

Ancient and Chaos shards and slates · Chaos Dungeon · Combat · Combat styles and Life/Spirit · Corruption · Death · Dungeons (tiered raids) · Fortify talent tree · Fortress (skilling raid) · Fortress Ledgers and Banners · Fortress rares · Raid wave respawn · Slay masters · Slay tasks

Statuses: confirmed is a value or rule in the game files; observed is measured from recorded play; dev note comes from a developer comment, tooltip or patch note; inferred is worked out from the files with the assumption stated; unknown is decided on the server. Game data read 2026-10-03.