Tatsu Tatsu no Mi, Model: Holy Dragon

The Tatsu Tatsu no Mi, Model: Holy Dragon (タツタツの実モデ聖なる竜, "Dragon Dragon Fruit, Model: Holy Dragon") is a Mythical Zoan-class Devil Fruit eaten by Marine Admiral Shiroryuu. It allows him to transform fully or partially into a holy dragon, as well as borrow its abilities.

Appearance
What did the Devil Fruit look like before it was eaten?

Usage
How does that character use this Devil Fruit? How does it function? Does this character use this Devil Fruit any differently from the previous user?

Strengths
What are the greatest benefits that this Devil Fruit gives to the user? What advantages does the user get from eating this particular Devil Fruit, that makes him/her special when compared to an ordinary person?

Weaknesses
Aside from the standard, universal Devil Fruit weaknesses (falling into large bodies of water, having Seastone attached to him/her, etc.,) what other, inherent weaknesses does this Devil Fruit present to the user? What does the user have to be cautious of?

Attacks
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Trivia
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