The Simbul's Spell Sequencer

When memorizing this spell, a wizard must select one to three other spells of 1st to 4th level. The number of spells is at the discretion of the wizard, though the maximum cannot be exceeded, and the spells can be of the same level or even identical-for example, three fireball spells. The selected magics must be cast immediately after the spell sequencer is memorized, employing the usual material components, but each casting is preceded by the word that will later unleash the spell sequencer. This word forms the verbal component of the spell; when it is spoken the sequencer is cast.

The linked spells need not be cast by the wizard memorizing the sequencer, or even by a wizard; priest spells can be linked to a sequencer. The linked spells have no effect until the trigger word is uttered. Then all of the linked spells take effect in the same round, one after the other, in the order in which they were cast, until all have taken effect. Spell damage is always the maximum possible, and targets are selected by the will of the sequencer-caster. The sequencer-caster must be able to see all intended targets when the sequencer is cast.