True20 Arcane Rituals

from the introduction:
As presented in the True20 rules, supernatural powers can be tapped into virtually at-will to create quick-fire magical effects. A wide range of powers are available (especially with the addition of the powers in the Adept's Handbook), however each Adept is limited in the number of powers he or she can learn and use – each power requires a feat slot.

This PDF presents a system for rituals, long and complex arcane procedures which can be used to bring about magical effects. It is intended to be used alongside the normal rules for powers, however in certain settings rituals may be the only means of creating supernatural effects.