Each team gets access to a spellcasting player, listed on their roster as normal. They'd be a lineman with -1 AV and Loner at maybe a 30K premium. E.g. Humans would get 0-1 Wizard _ 80K _ 6 3 3 7 _ Loner, Spellcaster _ GASP. They'd have access to all four main skill categories to describe their minor magic cantrips.
"Spellcaster" would be an Extraordinary skill. It would allow a player to cast a spell at the end of any Move action. Spells work on a 2+ with a -1 modifier for each TZ on the player when he casts (other than the target's). A failure would result in a turnover.
That's it. No Armour roll, no random effect. Just a turnover.
The spells a player could cast would be listed in the Spellcaster description. They be simple things like negate a TZ or knock over a player. The power of a spell would be balanced by the range rather than the casting roll. So for example a player could knock over one opponent in his TZ. Or negate one TZ in 3 squares. Or make a Stab roll on one player within 7 squares. Or "heal" any one friendly player anywhere on the pitch (goes from stunned/prone to standing).
Thoughts?
