FAQ
If the top card of my Life cards is already face-up or I have 0 Life cards, can I still "give all of my opponent's Characters −2000 power during this turn. Then, K.O. all of my opponent's Characters with 0 power or less"?
No, you cannot.
One Piece TCG [OP15]

[On Play] You may turn 1 card from the top of your Life cards face-up: Give all of your opponent's Characters −2000 power during this turn. Then, K.O. all of your opponent's Characters with 0 power or less. [Activate: Main] [Once Per Turn] Give up to 1 rested DON!! card to 1 of your {Sky Island} type Leader or Character cards.
Rarity
SR
Color
Yellow
Number
OP15-114_p2
Card Type
CHARACTER
Play Cost
5
Power
6000
Subtype(s)
Sky Island/Shandian Warrior
Attribute
Ranged
No, you cannot.