Yu gi oh - Duel Monster ( 1350+ playable cards )

Patch Notes — Chain Response Fix

Fixed: Activating a Spell or Trap no longer skips your opponent's chance to respond. Previously, response windows only opened on phase changes, attack declarations, and special summons — meaning an opponent's Mystical Space Typhoon (or any other Spell/Trap) would resolve with zero chance to react, even if you had an activatable Trap sitting in your back row.

Now: Activating any Spell or Trap opens a response window for the opponent whenever they hold an activatable Trap — matching how real chains work. This includes being able to chain your own set Trap before an opposing removal effect (like MST) destroys it.

Testing: Two new regression tests added (unrelated Trap opens the window; targeted Trap can be saved by chaining it in response), plus full build + 21 existing test batches + up to 150 simulated duels — all pass, no regressions.