Steve Jackson Games - Site Navigation
Home General Info Follow Us Search Illuminator Store Forums What's New Other Games Ogre GURPS Munchkin Our Games: Home

Go Back   Steve Jackson Games Forums > Roleplaying > GURPS

Notices

Reply
 
Thread Tools Display Modes
Old 02-25-2017, 10:35 PM   #1
SolemnGolem
 
SolemnGolem's Avatar
 
Join Date: Apr 2010
Default When does Rule of 16 kick in when calculating Magic Resistance?

I was working my way through a thought exercise when I realized I am confused about when MR gets factored in.

Say a Lich from Dungeon Fantasy Monsters 1 is casting a spell at an Angelic Emissary from DF9 Summoners. The Lich has IQ 15, Magery 6, and thus most of its spells are at Spell-20 or Spell-19. The Angel has Magic Resistance 4 and a Will of 15/HT of 15.

I'm not entirely sure what this means.

Does it mean that the lich's effective spell level is no higher than 16 (because of the Rule of 16), and then the lich applies a -4 penalty to cast the spell? And then the Angelic Emissary rolls at 19 (because of Will/HT 15 +4 MR) to resist?

Or do I factor in the MR at the Rule of 16 stage? So Lich casts at 19 or 20 first, and then we apply MR, and then if it's higher than 16 we reduce it to 16?

Sorry for the basic elementary question!
SolemnGolem is offline   Reply With Quote
Old 02-25-2017, 10:55 PM   #2
starslayer
 
Join Date: Dec 2006
Default Re: When does Rule of 16 kick in when calculating Magic Resistance?

Magic resistance is calculated in first.

IE: Will 10 MR 6 victim vs skill 20 caster:

Caster rolls against 16, victim rolls against 16.

Will 16 MR 6 victim vs skill 20 caster

Caster rolls against 20, victim rolls against 22

Will 16 MR 4 victim vs skill 20 caster

Caster rolls against 20, victim rolls against 20.
starslayer is offline   Reply With Quote
Old 02-26-2017, 01:52 AM   #3
SolemnGolem
 
SolemnGolem's Avatar
 
Join Date: Apr 2010
Default Re: When does Rule of 16 kick in when calculating Magic Resistance?

Doesn't the Magic Resistance count as a penalty to the caster's skill as well?

So a Magic Resistance of 4 would mean the Lich is also casting at -4, while the Angel gets to resist at +4.

I'm having trouble figuring out where the -4 to the Lich's casting factors in. Whether it comes before the Rule of 16 or after.
SolemnGolem is offline   Reply With Quote
Old 02-26-2017, 02:02 AM   #4
sir_pudding
Wielder of Smart Pants
 
sir_pudding's Avatar
 
Join Date: Aug 2004
Location: Ventura CA
Default Re: When does Rule of 16 kick in when calculating Magic Resistance?

Quote:
Originally Posted by SolemnGolem View Post
I'm having trouble figuring out where the -4 to the Lich's casting factors in. Whether it comes before the Rule of 16 or after.
Rule of 16 should be the last thing. It is really just to prevent overwhelming supernatural attacks from being over-powered.
sir_pudding is offline   Reply With Quote
Old 02-26-2017, 02:15 AM   #5
corwyn
 
Join Date: Aug 2004
Location: Saskatoon, SK
Default Re: When does Rule of 16 kick in when calculating Magic Resistance?

Quote:
Originally Posted by SolemnGolem View Post
Doesn't the Magic Resistance count as a penalty to the caster's skill as well?

So a Magic Resistance of 4 would mean the Lich is also casting at -4, while the Angel gets to resist at +4.

I'm having trouble figuring out where the -4 to the Lich's casting factors in. Whether it comes before the Rule of 16 or after.
Rule of 16 is a cap on the caster's effective skill against the target's resistance so my interpretation is it goes last.

So, your lich against:

Will 14, MR 4 Lich-16 vs target-18

Will 14, MR 2 Lich 18 vs target -16, so Lich rolls against 16
__________________
MiB 7704

Running: Savage Worlds Runepunk
Running: D&D 5e Tomb of Annihilation
Playing: GURPS Uplift?
corwyn is offline   Reply With Quote
Old 02-26-2017, 07:37 AM   #6
evileeyore
 
evileeyore's Avatar
 
Join Date: Jul 2006
Location: 100 hurricane swamp
Default Re: When does Rule of 16 kick in when calculating Magic Resistance?

Quote:
Originally Posted by SolemnGolem View Post
Doesn't the Magic Resistance count as a penalty to the caster's skill as well?

So a Magic Resistance of 4 would mean the Lich is also casting at -4, while the Angel gets to resist at +4.
Yes, exactly.

The other guys apparently just forgot to apply it.

And as sir_pudding said, Rule of 16 is last.

Thoerectical Lich with Spell-30, Angel with MR 6 and Will 15.

The Angel's resistance is a 21. The Lich's Spell skill is 26 (30-4)*, but is further reduced to 21 due to the rule of 16.


* But it still counts as Spell 30 for FP reductions, Casting Time reductions, etc.
__________________
Feel free to steal, borrow, fold, spindle, mutilate any rule, advantage, etc I come up with it.
evileeyore is offline   Reply With Quote
Reply

Tags
magic, magic resistance, rule of 16

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Fnords are Off
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 08:26 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.