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You can only use power-up abilities only, but you can flicker Thanos to reset the ability

The lands here are overall pretty weak

Lorcana is a registered trademark of Disney and Ravensburger, and all associated logos and trademarks are the property of their respective owners

Thassa, God of the Sea seems like it would be great in a go-wide merfolk deck, and it does have a place there because its activated ability helps with Coastal Piracy types of effects

She's not the most expensive competitive option, but she's not cheap if you chase the premium Zeus print

Such powerhouses are usually saved for the last parts of a battle as a trump card but this trio has some attacks that benefit more from early play