Combust

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Combust
Release								20 November 2012 (Update)
Members								No
Skill								Magic
Level								38
Type								Basic
Target								Single-target
Adrenaline								+9%
Equipment								Any
								300%
Cooldown								18 seconds (30 ticks)
Description
Explode the target, causing them to burn. 27%-33% Magic damage per hit every 1.8s (3 ticks). 10 hits. Damage over time. Generates 9% Adrenaline.
Animation
Sound effect
Advanced data
Struct ID								14729
Links								Struct14729

Combust is a basic Magic ability and one of two burn abilities for the Magic skill, the other being the special attack from the Roar of Awakening, Soulfire.

Usage

When activated the target takes damage over eighteen seconds, dealing ten hits that total to 270–330% of active spell damage. The percentage is decided on the first hit, and each subsequent hit will deal the same damage as the first.

If the player is wearing Kerapac's wrist wraps and uses Dragon Breath, a self-inflicted invisible buff will activate, in which if the player uses Combust six seconds after using Dragon Breath, Combust will immediately apply all ten hits onto the target with an additional 25% damage bonus. If the player is using Enhanced Kerapac's wrist wraps while having Enchantment of flames unlocked, it will deal an additional 40% damage instead. Combust can be used before Dragon Breath while wearing the wraps, but doing so this way will only apply the instant hit and damage bonus to the remaining hits that were not applied yet. This effect does not work in PvP.

If the player has the Conflagrate buff, which is a 15 second buff that is gained from using the Roar of Awakening's special attack, the damage is boosted by 40%.

Damage over time is only affected by some modifiers, including:

Damage bonus from equipment Visible combat skill boosts, from potions or other sources Vulnerability or its lesser form, Curse The Eruptive perk Among the slayer (effect) group: Dragon, Demon, and Undead Slayer perks, Dragon, Demon, and Undead Slayer abilities, the necklace of Salamancy, Keris variants, the NopeNopeNope perk, the Crumble Undead spell and ghost hunter equipment The hexhunter bow, inquisitor staff and terrasaur maul Scrimshaws and the Scripture of Amascut Icy Precision effect granted by Wen arrows

Unlike other abilities, damage over time is not affected by:

Damage boosting prayers and Ancient Curses (aside from their accuracy bonus) Damage boosting abilities: Berserk, Death's Swiftness, and Sunshine Zaros godsword's special attack Berserker's Fury relic power Berserker necklace's passive effect Most perks affecting variable damage, including Genocidal, Precise, and Ruthless Some items from the slayer (effect) groups, including: tuned Bane equipment and ammunition, Salve amulet (e), Demon slayer equipment, Darklight Critical strikes Slayer helmet and its variants All enchanted bolts, although the +1% adrenaline from ascendri bolts (e) and hydrix bakriminel bolts (e) will be granted if the effect is already active

Interactions

Combust has one of the highest number of specific interactions with other items, spells, abilities, and upgrades.

Dragon Breath ability:

• Deals 25% increased damage to combusting enemies.

Song of Destruction - the set effect of the Roar of Awakening and Ode to Deceit:

• With at least 1 Essence Corruption stack - Damage-over-time abilities have a 30% chance to deal all of their hitsplats immediately and remove their cooldown.
• With 2 items equipped - Damage-over-time abilities deal 30% increased damage.

Soulfire - the special attack of the Roar of Awakening:

• The player's next Combust within 15 seconds deals 40% increased damage.

Kerapac's wrist wraps and their enhanced version:

• The player's next Combust within 6 seconds of using the Dragon Breath ability deals 25% increased damage and deal all of their hitsplats immediately.

Enchantment of flames - upgrade to the enhanced Kerapac's wrist wraps:

• Increases the effect of Kerapac's wrist wraps to 40% increased damage.

Lunging perk:

• Increases the base damage of this ability by 10% + an additional 3% per rank, up to +22% at rank 4.

Blast diffusion boots and their enhanced version:

• Using Wild Magic applies the Blast Infused self-buff for (6s (10 ticks)).
• Blast infused increases the base damage of basic Magic abilities by +8%.

All of these effects combine multiplicatively, so if all of these effects are active then Combust will deal damage for 10 hits immediately, or an average of 1,007.1% ability damage. This can then be increased further by effects that buff damage in general, such as spells and prayers.

PvP Tactics

• Although not obvious, Combust could be combined with Asphyxiate to increase the chance of killing your opponent.

Counter-tactics

• Due to its low damage nature, ignoring it is actually the best method. Freedom is not recommended as it should be used to break free from stuns.

Monsters that use Combust

• Ambassador Jabari
• Armadylean battle-mage
• Armadylean shaman
• Armadylean shaman (Treasure Trails)
• Bandit Brawler
• Bandosian battle-mage
• Bandosian wild mage
• Bandosian wild mage (Treasure Trails)
• Black Heather
• Cabbagemancer
• Cabbageomancer
• Cadarn magus
• Captain Cora
• Cloaked zealot
• Cormes
• Cruor
• Crystal Shapeshifter
• Dragon-hunter mage
• Echo of Jas
• Elite Sakadagami
• Elite Sotapanna
• Enlightened Sotapanna
• Fumus
• Glacies
• Ikadia the Exile
• Imperial mage akh
• Infernal Mage (elite)
• JMod clone
• Kalphite King
• Manifestation of Erethdor
• Monkey spirit
• Olivia the Chronicler
• Oyu the Quietest
• Sakadagami
• Saradominist field medic
• Saradominist sage
• Saradominist thaumaturge
• Seasinger priestess
• Shame
• Tuz
• Ulthven necromancer
• Umbra
• Zamorakian leader
• Zamorakian occultist
• Zamorakian warlock (Battle of Lumbridge)

Cosmetic overrides

Combust has the following cosmetic overrides:

Name	Animation	Release Date	Source
Corrupted Combust		6 June 2024	Academy of Heroes

Gallery

• 
  Staff animation

Transcript

This article has an associated transcript page.
Click here for the transcript.

Graphical updates

• 
  Combust after 20 November 2012 (update)
• 
  Combust after 2 March 2026 (update)

Update history

This information has been compiled as part of the update history project. Some updates may not be included – see here for how to help out!

• update 2 March 2026 (Update):
  • Magic level: 20 → 38
  • Adrenaline: +8% → +9%
  • Cooldown: 15 seconds → 18 seconds
  • 5 hits → 10 hits
    • Hit every 1.2 seconds → 1.8 seconds
    • Average damage per hit: 28% → 30%
    • Average total damage: 140% → 300%
  • No longer deals increased damage when the target moves.

• hidden 3 June 2024 (Update):
  • Animation updated.

• update 4 March 2024 (Update):
  • Damage range: 20-37% → 25-31% (per hit)

• patch 26 November 2018 (Update):
  • Bleeds no longer deal 1 damage on their first hit in PvP.
  • Frag Shot and Combust now share a cooldown.

• update 20 November 2012 (Update):
  • Added to game.

Trivia

• During the Evolution of Combat beta, Combust dealt 200% damage.