domino said:
We all know the idea, take a book, and on this page, we have explosive runes. And on the next page, we have explosive runes. And on the next page, we have explosive runes...
And on this book, we cast dispel magic.
Now, my question, that I've been unable to find, is there a way to make sure you fail that dispel check? Or can you just not do all you can to succeed, and then hope you fail?
Depends on how your GM rules things.
If you have 1000 pages, each of which has Explosive Runes, and you have a 50% chance of dispelling any given one, then rather than rolling (or having you roll) 1000 d20's, the DM could just handle it statistically - half of them go off (for 500 6d6 blasts of Force Damage - 3,000d6 total, average 10,500 - instant death, really); if you are at 10th level, and the Runes are all at your maximum normal caster level, while the Dispel is done at a minimum caster level, then you have only a 25% chance of dispelling any given one, and 75% of them explode - for an average of 15,750 damage.
The GM could do the supression check on the book first, and those pages could all be elsewhere when the book was supressed, and you could get a dud.
The DM could also rule that they are handled sequentially - the first one you don't dispell goes off, dealing full damage to the book, destroying it and with it all further Explosive Runes, so that only 6d6 of force damage is ever dealt.
The GM could also rule that you automatically dispell any spell you cast yourself, and you just destroyed all those Explosive Runes to no effect.
Edit: Of course, an DM wanting to discourage this tactic could require you to roll for each and every Explosive Runes spell to see if it goes off, or not. Yes, that will be 1000 dispel checks, please.