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In Arknights, objects refer to various items that could help the player's units or hinder them in various ways.

Deployable

Deployable objects are available for deployment in the same way as Operators and summons at the cost of DP. The player only have a limited number of deployables available in one operation, which cannot be replenished even if the deployables are retreated.

Most deployables are invulnerable; exceptions are noted in the table below.

Object Use
Can be used to reroute enemies by forcing them to take a different path. Can be destroyed by enemies if it blocks one or when deployed in the way of Lava Cracks.
Introduced in Episode 05, causes enemy drones in its AoE to be slowed, silenced, and unable to attack. Can be attacked by enemies, who targets it over friendly units.
Introduced in Episode 07, deals heavy Pure damage to enemies and temporarily amplifies the damage they took, but takes a while to be armed once deployed.
Shieldguard Blocks the path of enemies to buy the player time to dispatch them.
Introduced in Code of Brawl, periodically gives additional SP to friendly units.
Introduced in Gavial the Great Chief Returns, can be used to clear out Giant Mushrooms and create Stumps.
Introduced in the Maria Nearl event, intermittently generates an electric arc when placed close together that deals Arts damage and slows enemies caught in its wake. Can be destroyed by splash damage from enemies; otherwise enemies never target it.
Introduced in the Maria Nearl event, stuns enemies caught in the detonation.
Introduced in Who is Real, deals Arts damage to enemies caught in the detonation and switches their Hui/Ming attribute; can also be used to switch the Hui/Ming attributes of Marks of Hui and Ming.
Introduced in Operation Originium Dust, can be used to reinforce Dirt Mounds.
Introduced in Operation Originium Dust, deals heavy Pure damage to enemies or instantly destroy Dirt Mounds caught in the detonation. Can be attacked by ranged enemies.
Introduced in Defence Protocols, rapidly retreats an Operator and greatly reduces their redeployment time.
Introduced in Dossoles Holiday, allows friendly units to be deployed over Deep Water Zones. Will be destroyed if the friendly unit on it is knocked out or retreated.
Introduced in Dossoles Holiday, makes a friendly unit immune to Erosion. Only usable in DH operations through the use of certain Stickers.
Introduced in Episode 09, can be used to immediately bring down Tattered Pillars or damage and shift enemies.
Battlefield Ruin Introduced in Episode 09, left behind on deployable melee tiles in a collapsing Tattered Pillar's way and behaves identically to Roadblocks.
Introduced in Near Light, can be used to permanently provide visibility to a specific melee/ranged tile.
Only available in Phantom & Crimson Solitaire, reduces the speed of surrounding enemies but will self-destruct after a while. Given through Support Fog Machine.png Support Fog Machine.
Only available in Phantom & Crimson Solitaire, pushes away the surrounding enemies once deployed. Given through Support Gas Tanks.png Support Gas Tanks.

Static

Static objects are permanently placed on the operation map and can be used at the player's discretion through their skills. Not all statics are useful for the player; some actually cause negative effects and are activated on their own without the player's intervention.

All static objects are invulnerable with exceptions noted in the table below.

Object Use
Stun Generator Damages and stuns the surrounding enemies at the cost of some DP.
Detector Reveals nearby invisible enemies when activated.
Turret Introduced in Episode 05, periodically fires a bolt straight ahead that damages the first friendly unit hit by the bolt.
Originium Ice Crystal Introduced in Episode 06, periodically releases a cold wave that inflicts Cold to friendlies caught in its wake. A friendly variant, FrostNova's Originium Ice Crystal, appears in Episode 08.
Originium Altar Introduced in Episode 07, periodically releases a pulse of Originium energy that deals Pure damage to anyone, friendly or enemy, caught in its wake. Sarkaz Guerrilla Casters and Fighters take no damage from the pulses and will be enhanced instead. A friendly variant, Patriot's Originium Altar, appears in Episode 08.
Static Roadblock Introduced in Episode 08, prevents allied units from moving through and reroutes enemies like Roadblocks until destroyed by friendly units, who can attack them but targets other enemies over the Static Roadblock.
Energy Aggregate Introduced in Episode 08, will release fireballs that deal Arts damage and inflicts Burning Breath to the four cardinal directions if not destroyed by friendly units first, who attacks them over enemies.
Command Terminal Introduced in Code of Brawl, can be activated once charged at the cost of DP to increase Unit Limit. Can be attacked by enemies; the player will lose 1 Life Point if a Command Terminal is destroyed.
Originium Flow Generator Introduced in Darknights Memoir, generates a strong airflow that increases/decreases the ATK of friendlies and the speed of enemies depending on their direction towards the airflow.
Gramophone Introduced in Twilight of Wolumonde, attacks enemies with percentage-based Arts attack and heals allies once "captured". Certain enemies can "contest" Gramophones, eventually turning them hostile.
Giant Mushroom Introduced in Gavial the Great Chief Returns, increases the DEF of adjacent units and can be cleared by Rhodes Island Temporary Employees to create Stumps.
Imprisonment Device Introduced in Mansfield Break, temporarily stun enemies and imprisons freed Prisoner enemies caught in its wake at the cost of some DP. Can be attacked by enemies.
Rubble Introduced in Contingency Contract Lead Seal, reroutes enemies like Roadblocks until destroyed by enemies, who can attack them if it blocks one.
Dirt Mound Introduced in Operation Originium Dust, blocks Sandstorms and reroutes enemies like Roadblocks. Can be damaged by Sandstorms (unless once reinforced) and attacked by enemies if it blocks one.
Pulse Defense Module Only available in Defence Protocols, can be used by the upper player to deal massive Pure damage and stun enemies on the lower layer.
Drone Factory Only available in Defence Protocols, can be used by the upper player to spawn a Cheap Second-hand Drone/Remodeled Second-hand Drone on the lower layer.
Teargas Control Valve Only available in Defence Protocols, can be used by the upper player to temporarily stop toxic gas from being released on certain parts in the lower layer.
Mobile Tactical Hangar Introduced in A Walk in the Dust, spawns Air Support Drones when they are summoned by certain enemies.
Emergency Aid Building Introduced in Under Tides, gradually removes Nervous Impairment build-up when activated by a friendly unit or Automatic Maintenance Drone adjacent to it, the latter of which improving the Nervous Impairment removal rate.
Tattered Pillar Introduced in Episode 09, can be damaged by reducing its HP to 0 and collapsed by attacking it once damaged, severely damaging enemies in its way or instantly knocking out friendlies and leaving behind Battlefield Ruins on deployable tiles. Can be instantly collapsed with Demolition Devices, but can only be attacked/damaged by adjacent friendlies.
City Neon Introduced in Near Light, provides visibility to the nearby tiles which is expanded once activated at the cost of some DP.
Unowned Treasure Introduced in Phantom & Crimson Solitaire, increases the Originium Ingot.png Originium Ingot received by the player upon clearing the operation as long as they remain intact; the Treasure is destroyed when an enemy comes into contact with one.
Host's Assistant Introduced in Phantom & Crimson Solitaire, periodically deals Pure damage to surrounding friendly units and reduce their ATK. Can be destroyed by friendly units, who attacks enemies over it; destroying the Assistant is the only way to damage the Troupe Mouthpiece.
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