Magic
Spell maker
Build a spell of your own, with up to three effects, and see what it costs in gold and spell points and what it does at each caster level.
Costs are the game's own: each effect is priced by what you ask of it, then the whole spell is multiplied by its target. The spell cost calculator prices a spell that already exists, and the spells database lists the ready-made ones. The rules are explained on Magic for non-casters.