Is it in any of the rules that magic items are indestructible and/or do not suffer aging effects? For example - the piece of paper with a magical coded message that cannot be torn. Or the magical knife that has been lost in the river for centuries, yet has no rust or damage.
Posted Apr 28, 2022, 3:30 PM UTC
To some extent, magic items are more resilient by default (see DMG 141). A magical script that can withstand the weathering of time or a magical knife that has maintained its edge and has not succumbed to rust after centuries of neglect seem fine to me.
If you're looking for a specific, mechanical ruling on certain magic items being truly unbreakable- then entry 15, Unbreakable, of the Minor Properties on DMG 143 has you covered
This
Magic Items are at least as durable as their mundane counterparts, and usually moreso. Nothing concrete more than that, but Unbreakable Arrows exist, so you could easily make that into a property for some other magic items.
Magical items are often quite durable, but if you want something properly indestructible then I recommend looking at artifacts, which can often only be destroyed with very specific rituals.
No.
It’s not explicit, but implied. For instance, rust monsters cannot damage magic items and neither can oozes. So it’s implied that most, if not all magic items are resistant or immune to degradation.