expand_less In order to perform any magical effect, either you or your target must be entirely contained within the boundaries of a special diagram. Creating this diagram requires a full-round action for every 5 ft. square contained within the diagram. Once the circle has been drawn, make a spellcraft check as part of the full-round action to draw the final part of the circle against DC 15 + the maximum caster level of any effect to be performed within the circle to determine if it was done correctly. You may take 10 on this check even if in combat or stressed. You can increase the speed at which you draw the diagram but at greater risk of making a mistake. For every step by which you reduce the time required to draw the diagram, increase the spellcraft DC by +5 to a maximum of +20 to draw the circle as a free action, but doing so prevents you from taking 10 on the check.
The diagram need not be drawn with any special materials, and can be done with sprinkled salt, paint, blood, or anything else that may be on hand so long as it is clearly visible. If the diagram is disrupted (any amount of damage dealt to the surface it is carved upon, or sufficient force from water, wind, or any other effect that might disperse the material the diagram was created with) then any magic previously cast stays in effect, but no further spells may be used until a new circle is drawn. Spells and effects created by magic within the diagram and summoned creatures never disrupt it even if they would otherwise.
This counts as 2 drawbacks when determining the number of spell points gained.