Increase spell's hit dice cap

[forger03]

How do i increase the number of hit dice affected by a spell such as, say, sleep? Is there a way to make this happen?

[Imbicatus]

Heavens Oracle with Awesome Display revelation using Color Spray.

[LazarX]

Different answers for different types of spells. This won't help with sleep, but damage dice capped spells like Fireball, and shocking grasp can be given 5 level raise with the Intensify Spell feat. You actually have to have those levels to fully benefit. Example Fireball with the Intensified Spell metamagic feat is cast as a 4th level spell with it's damage cap raised from 10 to 15 for a 15th level caster.

[forger03]

I know intensify, i have a fun magus build with it. 10d6 damage at 10th level with a first level spell. Makes for a great day.

I'm looking to make sleep a bit more effective, things like that.

[blahpers]

At some point, if you aren't playing PFS and have an amenable DM, you might consider spell research. The usual solution to increasing nonvariable caps is to use a higher level spell, such as deep slumber instead of sleep. Plus you get to name it something awesome, like Nimrod's Naptime.