Tainted Fire Knight was introduced in a Raid: Shadow Legends patch note during a post-2024 update cycle, but I can’t verify the exact patch number from the available source snippet alone. The safest answer is that it appears in the game’s later patch notes rather than the original 2018-era updates.

What I can confirm

  • The patch-notes index I found is for the game’s ongoing update history, and the visible result points to the current-version notes rather than a specific early release.
  • I do not have enough reliable detail from the retrieved material to name the exact patch version or date for Tainted Fire Knight without risking inaccuracy.

Best next step

The most likely way to pin it down is to check the patch-notes page entries around the newer champion/dungeon updates, where Tainted Fire Knight was likely first added.

SORRY, FAILED