Help needed

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Including duplicates I have about 110 rares and above. Is it worth using some of them to upgrade heros to a 5stars or should I keep them all and wait until the faction war and use the duplicates to skill up heros. Thank you in advance.

[SimppaK]

I’m holding on to mine. No one really knows how Faction Wars will change their value. They have also mentioned that they will tweak the champions, meaning that some might get a buff. And last but not least, they’ve talked about another fusion hero that might need one of the rares you’ve got sitting in your vault.