Tsuyo Tsuyo no Mi

The Tsuyo Tsuyo no Mi is a Paramecia-class Devil Fruit that gives the user incredible strength. Like most Paramecias, this effect can be activated or deactivated by the user's own will, meaning the user can occasionally have normal strength. The users strength will also be returned to normal if exposed to seastone or water, and someone with Arnament Haki equipped can take blows from them without the enhanced strength effect (though they can still be damaged indirectly).