monsters attack as if magic weapon

[Chugger]

I have a feeling I'm just not seeing the rule, but is there a level or CR where a monster claw or bite attack "counts as magic" or "is as if a magic weapon is used" for resistance and immunity purposes? Moon Druid gets to count as using magic weapon at lvl 6 iirc. I just don't see anything for this for monsters.

[Unoriginal]

I have a feeling I'm just not seeing the rule, but is there a level or CR where a monster claw or bite attack "counts as magic" or "is as if a magic weapon is used" for resistance and immunity purposes? Moon Druid gets to count as using magic weapon at lvl 6 iirc. I just don't see anything for this for monsters.

There is no specific CR where a monster claws or bite count as being magical. If a monster attack is magic, it is usually precised (or at least implied, if it's said they have a magic weapon or the like).

Moon Druid's attacks get to count as magic because of their training.

[Malifice]

I have a feeling I'm just not seeing the rule, but is there a level or CR where a monster claw or bite attack "counts as magic" or "is as if a magic weapon is used" for resistance and immunity purposes? Moon Druid gets to count as using magic weapon at lvl 6 iirc. I just don't see anything for this for monsters.

Read the MM.

Plenty of monsters have a 'magic weapon' rule where their weapons count as magical weapons.

[Mellack]

There is no general CR where attacks count as magical, it is specific in each monster's stats.

[Chugger]

Thanks. Just wanted to be sure I wasn't missing it, if such a rule was in the system. It seems not to be, except in a few spec. listed cases.