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The temporary effects can be useful finishers by allowing you to attack out with your entire board state, while permanent flying granters give continuous evasion to key threats, like your Voltron commander

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This can be sided against certain Decks, like Maliss and Metaphys, or just to recycle certain monsters when playing against Macro Decks

Banlist History Restriction changes recorded for Test Bear

And Mastermind's Acquisition and the minus ability of Karn, the Great Creator are notable mentions as well

Currently, there is only one Diavel Star monster, so I don't think it will be too much of a problem, but if the number of Diavel Star monsters increases, it will be interesting