In the first exmaple, after having added 5% quality, Increased Spell Damage: 24% * 1.05 = 25.2%
In the second exmaple, after having added 20% quality, there are some bonuses for Caster:
Increased Spell Damage: 4% * 1.2 = 4.8%
Increased Cast Speed: 5% * 1.2 = 6%
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