Charti Berry / Chople Berry / Life Orb (if you feel like you need that extra boost)
EVs: 252 Special Attack / 4 Special Defense / 252 Speed
Fusion Flare: Awesome Power, STAB
Ice Burn: 2 turns, but UNBELIEVABLE POWER, STAB
Dragon Pulse: You know why
Flash Cannon (Psychic): Coverage for those pesky Fairy and Rock types (if you don't go against Fairy types, take Psychic for Fighting types)
White Kyurem is great Pokemon placed in the Uber tier, whereas Black Kyurem is only OU. This is because of Black Kyurem's poor learnset, as it is a physical attacker, -the polar opposite of White Kyurem- and learns very few physical attacks, only having Outrage and Freeze Shock as reliable physical moves. White Kyurem however, has a great moveset, having reliable counters to ALL of it's weaknesses. Fairy? Flash Cannon. Fighting? Psychic. Steel? Fusion Flare. Coupled with a berry that resist Fighting or Rock types, and you got yourself and AWESOME special sweeper. Oh, and stat boosts? I don't think so, with a whopping 170 base special attack and a solid 95 base speed, this thing is probably one of the BEST special sweepers in Pokemon.