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Spellcasting
The Spellcasting Check
Spells require a spellcasting check with a DC = 10 + spell’s level.
Failure may trigger a mishap with unintended consequences, and the spellcaster can’t attempt spells of that spell level again until they take a safe rest. The GM has wide latitude about the results of any mishaps. They may choose to require a roll on an appropriate Magical Mishap Table or simply describe what malady the PC suffers.
The result of the spellcasting check is used to determine the success of a targeted spell, comparing the result to the target’s defense (e.g. 10 + a monster's RESISTANCE or a target’s relevant modifier). In this way a spellcasting check is both to see if the PC can successfully cast and hit a target.
Spellcasters can cast any known spell as a rite or ritual. This takes 1 hour per spell level of concentration, but doesn’t require a check.
Some spells last as long as concentration is held. Only one spell can be concentrated on at a time. Taking damage, making checks, or other distracting tasks may break concentration.