Buy Blox Fruits Shadow
Shadow is a Mythical Natural-type Blox Fruit. It lets you control shadows and use dark Umbra attacks. Some of these attacks also heal you when they hit an enemy.
Shadow is best for PvP. Its stun attacks deal high damage. It also has a special Umbra Meter that no other fruit has. The meter fills when you damage enemies with Shadow moves, and it fills on its own at night. A full meter makes Corvus Torment, the V move, much bigger and stronger.
Nightmare Leech is the C move. It heals you for 20% of your max health when it lands. It can also make a low-health enemy explode on contact. No other fruit has this life drain power. Umbrage, the F move, turns you into a swarm of crows so you can fly and hit enemies close to you.
Shadow can grind too, thanks to the wide damage on Corvus Torment and Umbrage. It is not a good pick for the First Sea or early Second Sea because its moves need high mastery. Shadow has a demand rating of 5 out of 10 with a stable trend.