Q
With a total of 5 power (SEND TO POWER) in my power charger, I set 2 cards: a power cost ★5 character card and a power cost ★4 enchant card.
Do both of their effects take effect?
A
Yes, both cards' effects take effect.
Even when you set 2 cards while preparing for the turn, power costs aren't added together. Each card is checked on its own.