Wild Card of Dual Power

Wild Card of Dual Power is an agent. It allows you to make another Tier 5 of the same type, but only once per card.

How to use
For this to work you have to have a Tier 5 already in use. Then, when you click on a tier 4 tower on the same path, instead of being locked, it will show the normal upgrade button, but below the price it says (wild card). This means when it is upgraded to tier 5 you will pay both the usual price and one wild card.

Gameplay
WCDPs are hard to get at first. (💵100) But as you complete special missions, you will gain one or two for the first few easy missions, and may get several for harder ones.