Which Mystic champ should I take to 5/50?

And the additional comments to explain your vote is welcome.

Comments

4 stars are lost their value so only rankup 5 stars

5* Guillotine or Morningstar. Some 4* champs are still very useful at 5/50, just realize that they probably wont be useful for war/Act5-6

I'd say either ghost rider or guillotine, both solid champs

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