Falling Icicle
Adventurer
I'd like HP to be based on your Con score at 1st level (like in 4e), but then increase very gradually from leveling.
In 3e, the con effect is constant. (not slightly increasing).
It is only slightly increasing if you use the approach of maximum hit points at first level [...]
...be multiple in effects.The effect of your constitution should...

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