YGOWB

YGOWB is a free browser world builder and simulator for custom Yu-Gi-Oh cards. Define supported effects, build decks and actually duel with your creations online or against the computer. Each World has its own card pool, banlist and publishing rules. Classic 2005-era rules: no Synchro, Xyz, Pendulum or Link. Account required. Unofficial fan project with optional AI assistance for art and effects.