I think I found a bug with the Xyrella Book of Heroes hidden puzzle. Can someone confirm? : r/hearthstone
Puzzle Lab: Puzzles involving the changed basic Priest cards have not been updated, rendering several impossible · Issue #1318 · HearthSim/hs-bugs · GitHub
THE BOARD CLEAR PUZZLE FROM HELL - Boomsday / Puzzle Labs / Hearthstone - YouTube
Hearthstone Puzzle Lab: Puzzle solutions and answers walkthrough | Rock Paper Shotgun