":D"
Is that "yes", oh my great Master?
"I will cut down the cost of Strength/Dexterity/Endurance by half in the next version. I hope that it will not render Willpower useless tough :/."
Make it free :-P.
"Yet can you imagine Gutts favoring another weapon instead of the Dragonslayer?"
"The setting is apparently related to some Berserk manga (of which I never heard before), but it doesn't influence the game in any way"
:-P.
"I'm almost out of those, so bring'em on :P."
O-kay...
The most obvious one, taken directly from DoomRL: Hard as Nails (would require significant prerequisite in order not to render IronMan useless - maybe IronMan lv 3).
Also:
1) Energy Vampire - gain few energy points\lv every time you kill a monster.
2) Long Range Combat Specialist: lv1 - Longer Throws, lv2 Faster Reload, lv3 Increased Accuracy, lv4 Increased damage. Of course, this might be separated into different skills for different weapon.
3) Adrenaline Rush - you gain Energy as you lose HP.
4) Lucky Dodger - 20%/level roll to dodge incoming missile (for those of us who hate imps).
5) Unstoppable - Decreased knockback, may swap places with monster (takes time, used as any attack does, may be resisted by more dangerous monsters).
6) Parry Specialist - increased defense when not attacking.
7) Bless of Death - 2%/level chance for every new monster not to spawn.
8) Lighting Strike - 10% a level to hit twice when attacking.
9) Fire Resistant - take only 1/3 of bomb damage.
10) Fairy Bless - Fairy Dust recovers more than MaxHP, decreases over time (DoomRL style), further levels increase "overburn", decreases bonus exhaustion rate.
11) Passionate - extends Berserk duration.
12) Panic Runner - may run using HP after Energy ends (3/2/1 point/lv/tile).
13) Avenger - monsters take damage from hitting you.