Glyph Seals from Magic Item Compendium

[James McMurray]

I'd definitely rule that it holds harmful spells only. It seems to fit the intent of the item, and it's obvious from the paraphrased WotC reply that it wasn't balanced with the idea of storing buffs factored in.

Regarding how incredibly cheap items are in the MIC, you also have to look at the Item Level. I don't have the book handy to check out the touch attack item mentioned, but while it may be incredibly cheap, it also might say that it's not appropriate for people lower than 12th level. Sending lots of low level mooks with these at someone would be a valid tactic, but would also be ignoring a new wealth guideline being explored in the book that introduced the item.

Enlarge Person vs. Animal Growth: you're really complaining about the disparity? One's 1st level and the other 5th. If they wereanywhere near equivilent I'd be the one doing the complaining. Animal Growth is beefy because it 1) somehow missed the nerf that hit Righteous Might and 2) can only target animals.

I won't even go into the idea of creating miscellaneous magic items based solely on the formulas given. At least no farther than to say that the DMG and now the MIC says those are guidelines, and that DMs should look at every item on a case-by-case basis,

 

[Ogrork the Mighty]

To make an item that Enlarges the wearer continually would be 4,000 gp.

I think you need to re-read all those comments by WotC game designers that warn against trying to cost magic items by rote calculation. There are other game-balance factors that need to be involved and this example would be one of them. It would only cost 4,000 gp if your DM approved it to cost 4,000 gp. Otherwise it would cost whatever he thinks it should cost, if he allows it at all.