Katara gives them a three-color commander with a relevant ability, breathing new life into a fun and exciting creature type
Obviously attractive as a Fight Rigging or fight spell target, the flexible mill angle is worth exploring
The current iteration of the MTGO client features the worst interface design since the 90s and even then I am pretty sure that Microposes Magic: The Gathering computer game from the late 90s featured better design than this

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You wont regret it
Obviously Pteramander should be in and would be improved with the higher spell count too