How do you enhance ISO-8 in future fight?

At the ISO-8 menu, you can enhance ISO-8 by feeding it other stones. The enhanced ISO-8 stones will have higher stats. However, you should NEVER enhance ISO-8’s unless it is 4 star or higher.

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How do you rank up in ISO-8?

You can upgrade your ISO-8 up to +5 by utilizing other ISO-8 as a material to gain higher stat boosts. You may also enchance the ISO-8 you’ve already equipped. You may get more ISO-8 from Daily Missions, S.H.I.E.L.D. Lab and Dimension Chests. Acquirable ISO-8 type change daily.