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Message: <blockquote data-quote="Elder-Basilisk" data-source="post: 1389520" data-attributes="member: 3146">In terms of damage per round, there's already an exponential effect to enhancement bonusses for weapons and strength increases (the easiest effects to analyze).A character who hits 50% of the time for 5 points of damage deals an average of 2.5 points of damage per round not counting criticals (lets assume he's fighting a zombie).Give that character a +1 handaxe instead of his ordinary handaxe and now he's hitting 55% of the time for 6 points of damage. That's an average of 3.3 points of damage per round.Make it a +2 handaxe and that's 60% of the time for 7 points of damage. 4.2 points of damage per round.+3 handaxe? 65% for 8 points. An average of 5.2+4 70% and 9 points for an average of 6.3+5 75% and 10 points for an average of 7.5 points of damage/roundAs you can see, each increas in enhancement bonus yields a slightly higher increase in average damage/round than the last. Going from +4 to +5 is more significant than going from +1 to +2Of course, that's not the whole story either. Feats like power attack and cleave can serve to magnify the exponential effect of the power.Most other items have similar effects. If your midlevel character wants to reduce the damage you take in a fight, going from AC 20 to 30 is far more significant than going from AC 10 to 20. If your 12th level wizard with a 17 int takes his headband of intellect from +4 to +6, that's more significant than going from +2 to +4. (Not only do his DCs increase, but he also gets better bonus spells--2nd and 6th level instead of 1st and 5th).What may be a more important reason is that it probably models the rarity that the game designers (and many DMs) want in their worlds. +1 weapons aren't exactly common but few DMs think that they're legendary items and there's only one of them in any given kingdom. +2 and +3 swords are a lot rarer but you still want to be able to put a fair number of them throughout the kingdom. When you get to +5 swords though, you're talking about something very rare and special. And a +10 (equivalent) sword--maybe there's only a few of them in the world (of course, epic changes the scale of things somewhat but that's neither here nor there). The point is that the exponential price increase fits increase in rarity fairly well.</blockquote>

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