Extension I

Arcane Transmutation/Alteration
Level: Magic user 4
Range: Caster
Duration: See below
Area of Effect: See below
Components: V
Casting Time: 2 segments
Saving Throw: None

The arcane words of an [extension I] spell act to lengthen the duration of another spell previously cast by the magic user by 50%. The previous spell must still be active and may only be of level 1, 2, or 3.