I'm A Banana
Potassium-Rich
Of course if you're taking on the tarrasque, it's funny if "get a bunch of magic bows or a huge number of magic arrows, and some 3rd level casters to magic up some weapons" is the only roadblock, is all. Dragons don't stand a chance!![]()
Well, I don't think "some 3rd level casters to magic up some weapons" (100? More?) is actually that small of a roadblock, really. I don't even imagine a magitech setting like Eberron has 100+ magic weapon batteries, though I'd imagine it best there.
Though I also think this was a deliberate choice. IIRC, part of the idea of bounded accuracy is that low-level NPC's still have a chance to take out big threats, and this helps with verisimilitude. The reason the dragon doesn't just burn every uppitty village to the ground is because enough of these ants can still kill it.
The Tarrasque in D&D is meant to be an engine of fantasy village destruction, a Godzilla for Middle-Earth. It achieves this largely by brunt of ignoring damage not from magic weapons, since most towns won't be able to get their hands on enough magic doodads (or mages enchanting their doodads) to do much.
It should also be an interesting encounter, and with this, the 150' archer does seem to negate a lot of T's threat, so I'm not sure it does that (with the caveat that if we're missing information, of course, this is an incomplete opinion).