Can I use this [Main] effect to K.O. my opponent's Character with 3000 power or less even if my opponent has no Stage with a cost of 1 or less on their field?

[OP07-017_r1] - Dragon Breath (Premium Booster -The Best- Vol. 2: Reprint) - One Piece Card Game

[Main] K.O. up to 1 of your opponent's Characters with 3000 power or less and up to 1 of your opponent's Stages with a cost of 1 or less.

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