OPTCG sim - practice One Piece Card Game battles in your browser

Free, no download, no account. Open a tab and you're in a full match.

SeaKing is a browser-based One Piece Card Game simulator. Build your own deck, paste a decklist you found online, or skip deckbuilding entirely and crack packs for a sealed draft. Every game tracks life, the DON deck, and full board state the way the physical game does.

The rules run in code, so nothing depends on both players remembering them. The sim walks the steps in order and only offers you the moves the rules allow: attack and block timing, counter windows, trigger timing, DON!! attaching and returning, effect ordering. Illegal plays are not possible, which is what makes it useful for drilling a line you are still learning.

You always have an opponent waiting. The AI searches its options each turn rather than following a script, and it will punish a loose attack. How the AI opponent plays covers what it does and does not see.