How to defeat KNOCK!!!

[Jack Simth]

Heh, not in my campaign.

Adamantine will bypass DR but it doesn't have hardness 20 that bypasses all hardness of 20 or less. This means it's still useful against constructs and such, but you can't dig a hole in an iron door using an adamantine toothpick.

I'm actually thinking of turning it into a coating, like silversheen, and just saying that the real metal is so rare as to be unavailable to mere mortals. I mean c'mon ... how many rocks that fall from the sky will actually contain this ore, and how many of those will be known and mined properly?

Even without Adamantine, though, that Fighter-5 with a Strength of 16, Power Attack, and a +1 Greatsword will cleave through an iron door just fine (although it might take a bit): Damage: +10 from Power Attack, +4 from Strength, +1 from the weapon enchantment (whether it's a real enchanted weapon, or a weapon with Magic Weapon on it), +2d6 from the base damage. His average hit against an object is 22 (before hardness/halving). Iron, at hardness 10, assuming that the sword only does half damage (calculated before hardness), means he's dealing damage on an average blow. Unless you do something to stop him, he WILL get through it that way.

Alternately, the Wizard takes Acidic Splatter (Complete Mage) and Heighten Spell. Acid does full damage to most objects. So that 3d6 the Wizard can silently spit out every round at level five will break hardness 50% of the time vs. an Iron door. Again - door fails, eventually.

Or maybe the door itself is untouchable for some reason. The walls are just stone (hardness 8).

Unless, of course, it's made of plot.

 

[Dross]

Even without Adamantine, though, that Fighter-5 with a Strength of 16, Power Attack, and a +1 Greatsword will cleave through an iron door just fine (although it might take a bit):....

From the Rules Compendium:
Ineffective Weapons
The DM can rule that certain weapons just can’t effectively deal damage to certain objects.

I'd judge toothpicks to doors/walls to be one such situation. Greatswords I'm inclined to say the same thing too (short swords definitely but I haven't had to rule that yet).

But back to the OP
A bar behind the door is all you need to stop knock.

 

[Theo R Cwithin]

But back to the OP
A bar behind the door is all you need to stop knock.

I think knock can get past a barred door:

The knock spell opens stuck, barred, locked, held, or arcane locked doors. It opens secret doors, as well as locked or trick-opening boxes or chests. It also loosens welds, shackles, or chains [...snip...]

 

[Theroc]

From the Rules Compendium:
Ineffective Weapons
The DM can rule that certain weapons just can’t effectively deal damage to certain objects.

I'd judge toothpicks to doors/walls to be one such situation. Greatswords I'm inclined to say the same thing too (short swords definitely but I haven't had to rule that yet).

Okay, Adamantine Greataxe.

 

[Jack Simth]

From the Rules Compendium:
Ineffective Weapons
The DM can rule that certain weapons just can’t effectively deal damage to certain objects.

I'd judge toothpicks to doors/walls to be one such situation. Greatswords I'm inclined to say the same thing too (short swords definitely but I haven't had to rule that yet).

But back to the OP
A bar behind the door is all you need to stop knock.

So you use an axe to the same effect. They're traditionally used against doors.

But after a point, you're looking at a DM fiat door. AKA, one you're not supposed to go through.

 

[Dross]

I think knock can get past a barred door:

Then obviously I need to read the desc better!

 

[Dross]

So you use an axe to the same effect. They're traditionally used against doors.

But after a point, you're looking at a DM fiat door. AKA, one you're not supposed to go through.

True DM fiat = infinite hardness.

But I've seen a number of comments about people complaining an adamantine toothpick is able to break through doors because the metal defeats low hardness.

 

[humble minion]

Multiple doors has always been my solution. What wizard memorises more than one or two knock spells?

An energy transformation field over the area also works beautifully (as it does against almost everything...) but it might be overkill. Still less expensive than the sovereign glue though.

 

[Jack Simth]

Multiple doors has always been my solution. What wizard memorises more than one or two knock spells?

Few, although many carry wands of the spell....

 

[Elethiomel]

Why be so dead set on defeating Knock? If your solution to blocking progress is doors, you will be tearing out your hair in frustration in a few levels anyway, when Dimension Door becomes available, not to speak of Passwall, Find the Path, Divination, etc. Doors and/or walls that are mysteriously immune to all the players' abilities, tools, and ingenuity is cool... once. After that, it just becomes annoying and breaks the flow of the game.