Hex, Uncommon, 11 gems
Charge(23)
If enemy has lowered your facility last turn:
Enemy tower-17
Having Charge(23) at the low cost of 11 gems is really, really potent by itself without even triggering the secondary effect. That's either 23 Attack or better than Stock -7 depending on the situation. It's also an odd number, both literally and figuratively. Why 23?