Tier
Strength system.
Tier 10 : Ordinary people - athletes .
Tier 9: Strong enough to destroy wall - a small house.
Tier 8: Strong enough to destroy large buildings - a small mountain.
Tier 7: Strong enough to destroy a large mountain - a small city.
Tier 6: Strong enough to destroy a large city - a small island - a large island.
Tier 5: Strong enough to destroy an entire country - a small continent - a large continent.
For the time being, we will stop here. I think the characters in the One Piece world will have powers at these levels only.
I estimate that the top strong characters of One Piece will have the power at Tier 6 or the highest at the low end of Tier 5.
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