I just thought that it would be really cool to have a water zone attack, let's call it storm flood, that deals a little bit of damage (1-2 dice) to every creature in the zone and additionally adds a water terrain conjuration to the zone so you can litterally flood the arena with attack spells
Love the idea, especially a zone attack (ex storm) as well as a big ranged attack (tsunami). I just don't want her to be like the Priestess, where you have a mage that has good abilities but can't stand her ground due to terrible attacks that do hardly any damage; good and reasonable dice would be 2-3 for a storm and 4-5 for tsunami.
Ps: Very interesting point on how to flood the arena, lets hope it gets in