i know a trick to get 3 star or 4 star from premium hero shard crystal open 2 crystals at a time don't rotate just click open. most of the time you will get 3star sometimes 4star or 2star.
i got 4 star ironman(infinity war), dr.voodoo, and loki
and 3star champs more than 20 from premium hero shard crystals.
i got 4 star ironman(infinity war), dr.voodoo, and loki
and 3star champs more than 20 from premium hero shard crystals.
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