Concentration

Concentration (CON)

Check: The character can use this skill to maintain concentration in the face of other distractions.

The table below summarizes various types of distractions that cause the character to make a Concentration check while casting a spell. "Spell level" refers to the level of the spell the character is trying to cast.

DC	Distraction
10 + damage dealt + spell level	Injury or failed saving throw during thecasting of a spell (for spells with a casting time of 1 full round or more) or injury by an attack of opportunity or readied attack made in response to the spell being cast (for spells with a casting time of 1 action).
10 + half of continous damage + spell level	Suffering automatic continuous damage
10 + damage dealt + spell level	Damaged by spell.
Distracting spell's save DC + spell level	Distracted by nondamaging spell. (If the spell allows no save, use the save DC it would have if it did allow a save.)
20 + spell level	Grappling or pinned. (Can only cast spells without somatic components and whose material component is in hand.)
10 + spell level	Vigorous motion (on a moving mount, bouncy wagon ride, small boat in rough water, belowdecks in a storm-tossed ship).
15 + spell level	Violent motion (galloping horse, very rough wagon ride, small boat in rapids, on deck of storm-tossed ship).
20 + spell level	Affected by earthquake spell.
5 + spell level	Weather is a high wind carrying blinding rain or sleet.
Distracting spell's save DC + spell level	Weather caused by spell, such as storm of vengeance (same as distracted by nondamaging spell).
15 + spell level	Casting defensively (so as not to provoke attacks of opportunity).
15	Caster entangled.

Special: A character with the Combat Casting feat gets a +4 bonus to Concentration checks made to cast a spell while on the defensive.

Retry: Yes, though a success doesn't cancel the effects of a previous failure.

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