Weird DnD rules glitch means Assassins are most lethal against badgers

The DnD Assassin subclass is a master of swift and decisive attacks, able to coat their weapons with poison so lethal it can ignore the poison resistance of their targets. That sounds equally edgy and awesome, until you realise that in the new Monster Manual, just six out of more than 500 monsters have poison resistance - and two of them are badgers.