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In addition to this, you can challenge an exerted rival character which you resolve instantly, exerting your character and then having both characters deal simultaneous damage

Each deck can have one or two Ink colors, so I imagine Amethyst will be a popular choice to pair with one of the others, if only for the card draw options

As in, right now

Draw: Draw one card from your deck

There are plenty of heroes which care about you casting non-creature cards like Final Fantasy IXs Vivi Ornitier

And even though she's in the Amber suite of cards, which is filled with other talented singers, this Ariel still outshines the majority of them because this puts her so far ahead of the curve just in utility alone