Kraedin said:I think it would be fine as a +3 bonus, as long as it doesn't maximize bonus damage dice, such as that from a flaming weapon or sneak attack.
seasong said:For the constant enhancement, if you wanted something a bit more complicated, you could have it in levels; each level reduces the die type by one step, and adds +2 to the damage. Each level costs +1. Can not exceed the die type.
So a 1d10 sword would stage like this:
1d8+2 (+1 enhancement)
1d6+4 (+2 enhancement)
1d4+6 (+3 enhancement)
1d2+8 (+4 enhancement)
1d0+10 (+5 enhancement)
A 2d6 sword would treat each die separately:
1d6+1d4+2 (+1 enhancement)
2d4+4 (+2 enhancement)
1d4+1d2+6 (+3 enhancement)
2d2+8 (+4 enhancement)
1d2+10 (+5 enhancement)
1d0+12 (+6 enhancement, and epic)

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.