Mercurius
Legend
I've found that 4E's critical hit rule is a bit boring, especially at lower levels ("ooh, max damage!"). Later on, and with various powers and magical items, it can get more interesting, but I would like there to be some kind of open-ended damage system in place, so that a single blow--even at 1st level--could theoretically kill anything. I've played with various rules before and none of them seemed to get it quite right, they were either too powerful and undermined the crit RAW, or too underpowered and thus pointless. So here's a new idea which, I think, comes close to being too powerful, but it also accomplishes the task of making combat more deadly (and maybe a tad quicker).
The Rule: Greater Critical Attack
A Natural 20 is a crit as usual, but a PC may spend a healing surge to make it a "Greater Critical Attack." Roll a d20 again, add that to the modified score. If a second Natural 20 is rolled, roll again and continue. The difference between the final modified roll and the target Defense is added HP damage.
Example
A 4th level human fighter (20 STR, a +1 vicious greatsword with Expertise and Focus, and a +12 basic attack) gets an opportunity attack against a Gnoll Huntmaster (level 5 artillery, 50 HP, 19 AC) and gets a basic attack and rolls a natural 20 and decides to spend a healing surge; on the second roll, a 12 is rolled, for a total of 20 + 12 + 12 = 44, the difference being 25 over the gnoll's AC of 19.
For damage, the fighter gets 10 (max for the natural 20) + 7 (STR, feat, enh) + d12 for vicious crit + 25 critical modifier = 43-54 range.
In the RAW the damage would be 10 + 7 + d12 for a range of 18-29.
Yeah, I know, that's a huge difference, and with an encounter or daily power the damage could be 10 or 20 HP more, but that's kind of the point: I want that critical hit to be able to kill a comparable non-Elite, non-Solo opponent. Against a Gnoll Marauder (level 6 Brute - 84 HP, 20 AC), the damage isn't quite so extreme, but still quite substantial, and with the potential - with an encounter or daily power, or a second Natural 20 (1-in-400 chance) and a high roll - of killing it.
I could take away the healing surge aspect and thus apply this to monster attacks as well, which makes character death more likely (maybe not a bad thing in 4E).
So what do you think? This rule may not be for your style of game, so I'm not looking for personal commentary as much as logistics. How will this affect a game? Potential problems? Ideas to improve it? Etc.
The Rule: Greater Critical Attack
A Natural 20 is a crit as usual, but a PC may spend a healing surge to make it a "Greater Critical Attack." Roll a d20 again, add that to the modified score. If a second Natural 20 is rolled, roll again and continue. The difference between the final modified roll and the target Defense is added HP damage.
Example
A 4th level human fighter (20 STR, a +1 vicious greatsword with Expertise and Focus, and a +12 basic attack) gets an opportunity attack against a Gnoll Huntmaster (level 5 artillery, 50 HP, 19 AC) and gets a basic attack and rolls a natural 20 and decides to spend a healing surge; on the second roll, a 12 is rolled, for a total of 20 + 12 + 12 = 44, the difference being 25 over the gnoll's AC of 19.
For damage, the fighter gets 10 (max for the natural 20) + 7 (STR, feat, enh) + d12 for vicious crit + 25 critical modifier = 43-54 range.
In the RAW the damage would be 10 + 7 + d12 for a range of 18-29.
Yeah, I know, that's a huge difference, and with an encounter or daily power the damage could be 10 or 20 HP more, but that's kind of the point: I want that critical hit to be able to kill a comparable non-Elite, non-Solo opponent. Against a Gnoll Marauder (level 6 Brute - 84 HP, 20 AC), the damage isn't quite so extreme, but still quite substantial, and with the potential - with an encounter or daily power, or a second Natural 20 (1-in-400 chance) and a high roll - of killing it.
I could take away the healing surge aspect and thus apply this to monster attacks as well, which makes character death more likely (maybe not a bad thing in 4E).
So what do you think? This rule may not be for your style of game, so I'm not looking for personal commentary as much as logistics. How will this affect a game? Potential problems? Ideas to improve it? Etc.