Staff of Focus

Imbued with the energies of Azyr, this staff assists its
bearer in channelling the destructive power of the storm.
Once per battle, in your hero phase, the bearer
can use this artefact. If they do so, add 1 to
casting rolls for the bearer until the end of
that phase. In addition, if the bearer casts a spell
that inflicts any mortal wounds during that
phase, add 1 to the number of mortal wounds
inflicted on each unit that the spell affects.