Is Wild Magic a prerequisite to playing to play a Chaos Sorcerer? If yes, when Wild Soul is used, how does the outcome affect the powers that already have a damage type
Explanation : If I roll a 5(Lightning), how will Burning Spray [At-Will ✦ Arcane, Fire, Implement] be affected?
Wild Soul : When you finish an extended rest, roll a d10 to determine a damage type. Damage Types:
1 Acid, 2 Cold, 3 Fire, 4 Force, 5 Lightning, 6 Necrotic, 7 Poison, 8 Psychic, 9 Radiant, 10 Thunder. You gain resist 5 to that damage type until the end of your next extended rest. The resistance increases to 10 at 11th level and 15 at 21st level. While you have resistance to that damage type, your arcane powers ignore any target’s resistance to that damage type up to the value of your resistance.
Also is it possible to play a Chaos Sorcerer using Dragon Magic?