Wrench
Wrench Megabonk – Explained
The Wrench reduces shrine charge time by 4% per copy and increases shrine rewards by 7.5% per copy.
Although the in-game description says "4% faster", the shrine code reduces the charge duration linearly. There is a slight difference mathematically here.
Charging a shrine (without any wrenches) takes 5 seconds in game
Each copy of the wrench makes it take less time to charge a shrine until you have 24 Wrenches. Here you reach the hardcap of how fast a shrine can charge which is 0.2s. More copies of the wrench does not reduce the time it takes to charge a shrine, but it keeps increasing the rewards you get.
Wrenches do not work on boss pylons. Only regular Charge Shrines are affected.
Although the in-game description says "4% faster", the shrine code reduces the charge duration linearly. There is a slight difference mathematically here.
Charging a shrine (without any wrenches) takes 5 seconds in game
Each copy of the wrench makes it take less time to charge a shrine until you have 24 Wrenches. Here you reach the hardcap of how fast a shrine can charge which is 0.2s. More copies of the wrench does not reduce the time it takes to charge a shrine, but it keeps increasing the rewards you get.
Wrenches do not work on boss pylons. Only regular Charge Shrines are affected.
How it Stacks
Linear scaling for both shrine charge time reduction and reward increase.
Each copy reduces shrine charge time by 4% of the base 5s duration (additive, linear). This follows:
At 24 copies, shrine charge time reaches the hard cap of 0.2s.
Each copy also increases shrine rewards by +7.5%:
Each copy reduces shrine charge time by 4% of the base 5s duration (additive, linear). This follows:
$$T(n) = \max(0.2, 5 \times (1 - 0.04n))$$
At 24 copies, shrine charge time reaches the hard cap of 0.2s.
Each copy also increases shrine rewards by +7.5%:
$$\text{Reward Multiplier} = 1 + 0.075n$$
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