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Blizzard now has 7 or 8 different Runes created, with 5 to 6 different quality levels like Minor, normal and Major created. Their rune creation process has them thinking what kinds of effects would many spells benefit from, and if they cover a wide range of spells from all characters, they proceed to create the Rune. The Runes will have varying levels of power depending on their quality level. For example, a Minor Multistrike Rune attached to the Skull of Flame will make projectile skip along the ground once , but higher quality Runes like the Major Multistrike Rune may raise the amount of bounces and the distance traveled by the projectile.