As a Werewolf who is immune to non-magic physical damage, can Swarm of Rot Grubs get past my skin

I’m a part of a homebrew setting 5e game where the real homebrew, outside of lore, is only custom monsters that are rarely made by the DM as he prefers to use normal dnd monsters when he can. In this latest game, he used Swarms of Rot Grubs and one managed to hit me and a turn later dig in.

However, I questioned how the Grubs got through my skin in the first place as normal swords and spears failed to pierce my hide in the past.

DM ruled it as they do, so I will accept it as such….also helps we’re fairly mid-game, so we have someone with lesser restoration.

But I want to know how the internet thinks about this, since the Grubs have no way of hurting me, can they still somehow bypass that Immunity to feast on my heart?

DM allows content up to Tasha’s. From what I understand it’s the basic version of DnD 5e. Apologies if that doesn’t clarify things better.

Is it possible to play an Epic D&D3.5/Pathfinder campaign with a non-magic hero?

My DM is going to arrange a campaign of Epic Gestalts (LvL 24/24), I wanted to play a non-magic user, but they are so underpowered that I probably can’t, the closest to a non-magic user I seem to find is using Tome of Battle. Is it the only way?

My Character Idea

My idea was to do something like a Warblade16/Factotum8 With a Swashbuckler3/Something11/PathfinderDuelist10 (Even though, Factotum is a bit magic user :-T)

But I don’t know if a mage with a Wish or even any creature on the Epic Level Handbook can launch my character to the stratosphere without effort, where he hopelessly dies.

Although I don’t think the campaign will focus on combat, I don’t want to be placed in disadvantage.

We are using a 3.0, 3.5, Pathfinder gestalt hybrid of handbooks which mean the most useful of the three versions is what we use.

Oh and another question (if you think the build could go as I put it)…

What Should I place in Something 11? (I don’t know if I should do Factotum 11)

The Campaign Idea

In a Forgotten Realms pre-Spellplague Faerûm, 5 characters will go to the city of the dead to argue with Kelemvor about The Wall of the Faithless And the injustice it is to actually exist. If he doesn’t cooperate chars should prepare to change it with not so diplomatic ways.

The other Chars

I don’t have all the info, but I do have some vague idea of what we are having

  • An ArcaneUber[Wiz/Src]/AbleCombatant
  • A Warlock/Master of the Nine [ToB]
  • An UrPriest/Avenger of something (Kinda Barbarian/Roguish something)