Concentration (D&D skill)

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Unofficial rules compendium

Maintaining Spells

With the recharge magic system, a spellcaster can maintain a large number of spells with a duration by constantly re-casting them. Constantly re-casting such spells over a long period requires stamina and discipline. Buffing up before a known danger is not a problem; maintaining several spells diligently over a longer period is hard.

When a spellcaster who wants to constantly maintain a number of spells is suddenly faced with the need to see if they are active (such as by an unexpected combat), make a Concentration roll for each such spell, with a DC from the following table.

Condition	DC
Duration 1 round/caster level one minute	20
Duration 1 minute/caster level or 10 minutes	15
Duration 10 minutes/caster level or one hour	10
Duration 1 hour/caster level	5
Maintaining more than one spell	+ number of spells
Distracted or lowered guard	+5

A successful roll means the spell is active. For spells with a duration in minutes or rounds, assume the remaining duration is one round per point of margin (on an exact success, the spell is only active until the end of your first round). Assume all spells maintained in this manner have recharged.