FAQ
If my Leader has an effect that reads "is treated as a card with all card names, types, and attributes," does this [Main] effect make my Leader's base power become 7000 during this turn?
Yes, it does.
One Piece TCG [OP16]

Card Description
[Main] If you have 10 DON!! cards on your field, all of your [Prisoner of Impel Down] cards' base power becomes 7000 during this turn.[Counter] Up to 1 of your [Buggy] gains +4000 power during this battle.
Card Details
Rarity
R
Color
Blue
Number
OP16-058
Card Type
EVENT
Play Cost
1
Power
0
Subtype(s)
Impel Down
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Price History (USD)
Price Info
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$0.10
All time High (last 6 months)
$0.19
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$0.06
Yes, it does.