Two former enemies now feel like going around killing people
Kain has no Dimension, Shield, Magic Reformation or INSTANT SOUL SUCKING POWERZ, or time. Seph has no Sin Harvest.
Round 1: Roxas, Sora, and Riku (No damn forms)
Round 2: Night Terror and Abyss
Round 3: Saix and Xigbar
Round 4: Dante and Virgil
Round 5: Xemnas (No Dimension Crap) and His Stupid Heartless.