The Mp cost is doubled So for thunder spear it would be 48 MP cost and the power is 1.35 more so 170*1.35
Which does it amplifys, total magic or damage?
total magic 500
thunderspear 170
It amplifies magic 500 to 675 or it amplifies thunderspear 170 to 229.5?
That's correct. You can think of it as multiplying the base attack by 1.35, or you can think of it as just multiplying your damage by 1.35 (both will result in the same damage output).
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