This chapter strongly implies that an immortal having COC makes it much harder to deal with their regen based on Gaban going from confident they could stop Harald's regen based on him dealing with COCless HKs in the past to pointing out Harald's own COC as an issue.
I believe it's fully possible Luffy tried to use COC against the elders but they kept bouncing back as they were all portrayed as "terrific" COC users. (whether it's due to abyss contract is irrelevant)
Story wise it makes much more sense than Luffy "holding back" while constantly complaining about how nothing he attempted against the Gorosei worked.
I believe it's fully possible Luffy tried to use COC against the elders but they kept bouncing back as they were all portrayed as "terrific" COC users. (whether it's due to abyss contract is irrelevant)
Story wise it makes much more sense than Luffy "holding back" while constantly complaining about how nothing he attempted against the Gorosei worked.

