From D&D Wiki
|This material is published under the OGL|
- 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.
|10 + damage dealt + spell level||Injury or failed saving throw during the casting 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 continuous 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.|
|10 + spell level||Weather is wind-driven hail, dust, or debris.|
|+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).|
- A character with the Combat Casting feat gets a +4 bonus to Concentration checks made to cast a spell while on the defensive.
- Yes, though a success doesn't cancel the effects of a previous failure.