E.g. When performing Resonance, required FINA would increase accordingly from layer 1 to layer 5, after the layer 5, FINA will not increase and remain the same amount as layer 5's cost. If Resonance is not used after 14 days, the Resonance layer will decay from layer 5 to layer 4, required FINA would also decrease, and so on. On the other hand, if you activate Resonance within 14 days, Resonance layer would remain on layer 5 and the decay period would be reset back to 14 days.