athornton: Angry.  Drunken.  BOFH. (Default)
[personal profile] athornton
For my Vornheim/Gaxen Kane game. Draft 1. Subject to change.

Each time an M-U spell is cast, caster must roll:

SL = "Spell Level"
CL = "Caster Level"

(SL ^ 2) / (10 * ( CL + 1 ) )

Round that fraction to the nearest 5%, and caster must beat it on a D20. 1 is always a failure, 20 is always a success.

If the roll fails, the caster must make a saving throw vs. magic with a penalty of the spell level (so, -1 for a first level spell, -3 for a third level spell, etc.)

If *that* saving throw fails, roll 1d6. The demon powering the spell:

1-3) devours 1dSL from a random ability score
4-5) devours 1dSL maximum hit points
6) confers a mutation: roll on the d100 mutation chart from http://monstermanualsewnfrompants.blogspot.com/2011/12/1d100-table-of-mutations-and-wait.html


We can also use this for "overcasting" ; each time you cast a previously-memorized spell no longer in memory, it is treated as if you added the spell level to the effective spell level.

Thus: you're a first level magic user with _Magic Missile_ memorized. You cast it. That creates a 1/20 chance of something bad happening.

Then, you cast it again: it's now an effective level of 2, so there's a 4/20 chance of mishap. Your third try? 9/20....and your saving throw penalty increases too.

And...you can do this for learning and casting spells too hard for you at your current level, as well.
This account has disabled anonymous posting.
(will be screened if not validated)
If you don't have an account you can create one now.
HTML doesn't work in the subject.
More info about formatting

If you are unable to use this captcha for any reason, please contact us by email at support@dreamwidth.org

Profile

athornton: Angry.  Drunken.  BOFH. (Default)
athornton

October 2024

S M T W T F S
  12 345
6789101112
13141516171819
20212223242526
2728293031  

Most Popular Tags

Style Credit

Expand Cut Tags

No cut tags
Page generated Jul. 17th, 2025 05:47 am
Powered by Dreamwidth Studios