Supric
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The computer freezes when, during the computer's turn, the mouse is hovered over a spell in the quick panel or somewhere else where pop-up tooltips appear.
Well, luck doesn't seem to work, is that known? It doesn't seem worthwhile to heavily invest in Inferno.
I checked the bug with the area-of-effect spell. Arachne's Web is cast normally, even when there is an obstacle in the spell's area. So, it seems to be a bug specific to Ice Storm.
Arachne drains with a strength equal to the number of units in the stack MULTIPLIED by 15.
That's how many percent.