One use only. A Power Scroll can be used when the Wizard makes a casting attempt. During that casting attempt, any roll of a double (except 1's) counts as a 6 for the purpose of resolving Ultimate Power.
Source: Warhammer Armies Project
One use only. A Power Scroll can be used when the Wizard makes a casting attempt. During that casting attempt, any roll of a double (except 1's) counts as a 6 for the purpose of resolving Ultimate Power.