How can I make an object (nearly) indestructible?

Is there any way to protect an object from destruction, as a player? If so, how expensive would it be?

Let’s say I become a lich — is there any spell/ritual/artifact/other that can make my phylactery indestructible? (Apart from hiding it, obviously.) I’m thinking of Voldemort’s Horcruxes, wich were pretty much a PITA to destroy.

Any means mentioned in official source is good, and needing to use multiple things together is fine.

(How) Can the Cursed -2 Sword be turned into an indestructible +2 sword of instant summons?

One of the standard cursed items is a longsword that causes the user to take a -2 penalty to attack and damage rolls, and is automatically drawn and fought with, even if the user intended to use another weapon. It also can’t be “gotten rid of” except with limited wish, wish, or miracle.

This has some interesting properties that seem like they might be beneficial: for one, the sword doesn’t say that it needs to be on your person in order for it to force itself into your hand, meaning you’re always a move action away from having a sword to use, even if you left the weapon at home or on another plane. For two, the sword’s specific ways of being “gotten rid of” implies that the sword is immune to damage (and possibly even much more powerful effects, like mage’s disjunction)

However, the penalties in combat are annoying, as is the fact that you would be unable to, for example, wield a mace or bow for specific situations.

Issue 348 of Dragon Magazine offers a potential solution for the first issue, a special type of casting of the bestow curse spell:

The target’s armor, shield, or one of his weapons (caster’s choice) becomes cursed. Its enhancement bonus is reversed and it loses any other special abilities, so a +4 flaming longsword becomes a -4 longsword.

It’s clear that the Cursed -2 Sword’s combat penalties are those of a -2 magic weapon. In fact, “-2” is even in the name of the weapon, much like weapons with positive bonuses. However, it’s a situational penalty. Is this still the same as a “negative enhancement bonus” for the purposes of remove curse, and therefore can be reversed to create a “Cursed +2 Sword”? (I’m assuming that it would retain the rest of the curse if so, because cursed item “properties” aren’t “special abilities”. This also means that the enhancement bonus wouldn’t function against practice targets, but that isn’t a big deal)

From there, we’re left with a fairly potent, if narcissistic (considering it’s not sentient) sword. Removing this particular aspect of the curse is where I’m at a bit of a loss.

The closest I can think of is the likes of a miracle, which is able to “Undo the harmful effects of certain spells, such as feeblemind or insanity.”, or limited wish/wish, which are similar. Seeing as how the Cursed -2 Sword requires bestow curse and limited wish or miracle to craft, it seems like it may be the case that its curse is the result of a spell. But is it within those spells’ power to undo only part of a “harmful” effect, rather than completely removing the curse? And even if so, it’s not like the alteration is simply removing a block of text. It’s changing

After one week in a character’s possession, the sword always forces that character to employ it rather than another weapon. The sword’s owner automatically draws it and fights with it even when she meant to draw or ready some other weapon.

to

After one week in a character’s possession, the sword can always be employed rather than another weapon. The sword’s owner automatically draws it and fights with it if she wants to.

(or something to that effect, probably worded in a way that flows better but keeps less of the original text) Effectively, it removes the “always” from the cursed behavior, and allows it to function more like any other item–that is, at the user’s volition.

So, is it possible to make these two alterations to the Cursed -2 Sword? And if so, is it possible using the above methods, or are there some other rules/spells that must be used?

(This is proooooobably more of a thought experiment than anything I’d try to get with in an actual game–cursed items are pretty uncommon, and at the sword’s caster level, limited wish, instant summons, and numerous weapons stronger than +2 are generally available. As such, I don’t mind silly-but-functional solutions or those that involve substantial amounts of cheese)

Does having the Shield Master feat mean that the shield is indestructible?

Does having the Shield Master feat mean that the shield is indestructible?

The Shield Master feat (PHB, p. 170) says:

  • If you take the Attack action on your turn, you can use a bonus action to try to shove a creature within 5 feet of you with your shield.

  • If you aren’t incapacitated, you can add your shield’s AC bonus to any Dexterity saving throw you make against a spell or other harmful effect that targets only you.

  • If you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you can use your reaction to take no damage if you succeed on the saving throw, interposing your shield between yourself and the source of the effect.

The last part… as a reaction yada yada yada….

Last game session our paladin used his +1 shield to block a young dragon’s 11d8 fire breath weapon, and prior to this, he did the same when confronted with an 12d6 explosive device of fire and shrapnel. How is his shield not riddled with holes from the explosive, and how is it not a melted slag of metal after the dragon’s fire breath? Yes he made the saves, but shouldn’t placing the shield directly in line of harm’s way to protect him also heavily damage the shield if not destroy it?

The feat just says the PC doesn’t take damage, but does not account for shield’s condition after. Is a shield indestructible with the feat?