tanjiro s bright red nichirin sword tanjiro kills muzan with the red sword turn red in demon slayer sword turn red in demon slayer flaming sword in demon slayer season 3 tanjiro s new black sword it s sword turn red in demon slayer demon slayer watch tanjiro s sword get sword turn red in demon slayer the slayer of brightness new sword demon slayer s tanjiro unlocks his every nichirin sword color meaning in demon slayer tanjiro s black blade