A lab and workshop upgrade that reduces the rebuild time of the wall by a number of seconds.
| ‣ | Type | Common | Rare | Epic | Legendary | Mythic | Ancestral |
|---|---|---|---|---|---|---|---|
| Wall Rebuild substat | ‣ | n/a | n/a | -20s | -40s | -80s | -100s |
https://the-tower-idle-tower-defense.fandom.com/wiki/Wall_Labs/Wall_Rebuild#Wall_Rebuild