I would say this RP is quite low powered. Expect the most powerful of your abilities to be just able to level a small building, at great effort. For the more regular and rapid fire spells, think WW2 era rifles, explosive fireballs that can blast chunks out of walls, or freezing bolts that stop a person cold. You can also heal minor wounds, form armor that can withstand a couple of cannon shots, control minds, throw smoke bombs, short ranged teleportation... the list goes on. I hope this helps a bit?

EDIT: Also, Kestrel isn't the type of GM that spends all his day plotting how to murder his players. You can focus on RPing instead of preventing your player from dying, so you don't need to try too hard with the player abilities. Just have fun making things interesting.