[TFS 1.0] Better way to pass variable

[Syryniss]

Hi. I looked into the spells that are included in TFS 1.0 and I found apocalypse spell. I want to modify it to use mine custom damage formula. I wanted to ask, is there any way to pass variables better than I did? I mean, now the damage is calculated for each tile which is 42 times when it needs to be calculated only once. Link to script