Ys Seven-codex ⭐ Must Watch

If you mean this as a “good feature” in a technical or user-focused sense, here are possible interpretations:

"Ys SEVEN-CODEX" refers to a specific digital release (likely a "crack" or repackaging by the group CODEX) of the action-RPG Ys SEVEN-CODEX

Ys SEVEN is famous for its difficulty spikes. The dragon bosses are aggressive, multi-phased puzzles. The CODEX version allows you to save-scum (save and reload freely) to learn patterns, which is harder on original consoles with slower load times. If you mean this as a “good feature”

Also note that it's probably most effective to do them right before going to final fight of the game. * Stroker of Weapons' Souls. Steam Community Ys Seven FAQs, Walkthroughs, and Guides for PC - GameFAQs and Guides for PC - GameFAQs