Teargas Control Valve
| “ | Controlled by the Upper Level test team, automatically activated, friendly units in the Lower Level constantly lose HP while active. | ” |
| —Abandoned Factory description |
The Teargas Control Valve is a static device in Arknights, exclusive to Test Site #03 of Multivariate Cooperation: Defence Protocols, Abandoned Factory.
As with other static units in M.C., the Teargas Control Valve consists of an upper part and a lower part. The lower Teargas Control Valves continuously disperse a noxious lachrymatory agent to the surrounding tiles, dealing Pure damage every second to friendly units caught in its wake. The gas dispersal can only be stopped by having the upper player deploy their units in the adjacent tiles to an upper Teargas Control Valve (marked by a lightning bolt like an L-44 Gramophone's Protocol Entries) to make it generate 1 SP every second per unit, with the friendlies having their DEF halved and has Taunt. Once the upper Teargas Control Valve is fully charged, the corresponding lower Teargas Control Valve will cease dispersing gas for a period of time.
Stats
| Activates automatically in set intervals. When SP is full, stops releasing gas into the Lower Level Test Area | |||
| HP | ATK | DEF | RES |
|---|---|---|---|
| 100 | 0 | 0 | 0 |
| DP cost | Redeployment time | Block count | Attack interval |
| N/A | N/A | 0 | N/A |
Skill
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Close Valve Auto Recovery Auto |
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| Effect | 
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| When activated, recover 1 SP every second for every neighboring allied unit; Neighboring allied units have 50% reduced DEF and become more likely to be attacked by enemies; Allied units in the corresponding area in the Lower Level Test Area receive 120 True damage every second | 0 | 30 | – | |
| Addendum | ||||
| This skill is used by the Tear Gas Control Valve in the Upper Level Test Area. | ||||
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Open Valve Auto Recovery Auto |
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| Effect |
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| When activated, allied units within range receive 120 True damage every second | 0 | 50 | – | |
| Addendum | ||||
| This skill is used by the Tear Gas Control Valve in the Lower Level Test Area and will be automatically activated when its Upper Level Test Area counterpart is activated. | ||||