Why is the hand so powerful?

The Hand's power is very similar to that of Cream. Its unique power of space erasure makes it theoretically one of the strongest Stands of Diamond is Unbreakable, but as Josuke points out, Okuyasu's slow wit dampens its potential.

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Regarding this, why does okuyasu have lines on his face?

It is technically possible but extremely risky. In order to heal Okuyasu's dad someone would have to defuse the flesh bud from him, illuminate all the damage it caused to his body at a mental and physical level, and negate the mutations to his original body. Thereof, can the hand beat goku? This ability, if not evaded (if that is even possible) can beat anyone of the Z-Fighters, hands down. However, one fighter who would at least be able to hold his own would be Goku.

Is Okuyasu poor?

Okuyasu was born the younger brother of Keicho and lived a somewhat impoverished yet happy life with his mother and father. Then, can okuyasu erase anything? Okuyasu can erase things like space, there hasnt been anything that he couldnt erase.

How strong is Za Warudo?

The World ( perhaps best known as "ZA WARUDO") is the most powerful Stand in Part 3 by a mile. He's like Star Platinum, but faster, stronger, and better at stopping time! Numerous fans think that The World actually would've been Jonathan's Stand, had DIO not killed him and took over his body. What is Star Platinum requiem? Star Platinum Requiem or in short as SPR, is a Custom/Unofficial Stand, used by Stand User Jotaro Kujo. Star Platinum Requiem's theme is a remix of Amend by j^p^n, similar to Shadow The World Requiem's theme, but with Jotaro's HFTF voice lines instead. It also plays it's HFTF theme but with a rock cover.

In respect to this, how do you pronounce hierophant green?