The strength of the cover is the value of the first ingredient multiplied by the value of the second.
: ''substance<sub>1</sub>.potency * substance<sub>2</sub>.potency = cover.power''
For example, a cover made from Onion (2) and Nettles (3) would be (2 x 3 = 6) 6 potency. The maximum potency is 25.
== Potency List ==