IDK it would be a pretty cool feature

HEAR ME OUT: WHAT IF YOU COULD PUT POTIONS ON SWORDS AND AXES? IF YOU COMBINED A SWORD AND A NEGATIVE POTION SOMEHOW, IT WOULD MAKE ANY MOB YOU HIT GAIN THAT POTION'S EFFECT (POISON POTION GIVES POISON EFFECT, HARMING POTION DOES INSTANT DAMAGE EFFECT, DECAY POTION GIVES WITHER EFFECT, ETC.)