YOU SAID:
I summon the power to be strong
INTO JAPANESE
強くなる力を呼び起こす
BACK INTO ENGLISH
evoke the power to become stronger
INTO JAPANESE
より強くなる力を呼び起こす
BACK INTO ENGLISH
call forth a stronger force
INTO JAPANESE
より強い力を呼び起こす
BACK INTO ENGLISH
call forth a stronger force
That didn't even make that much sense in English.