In a deck packed with many cantrips and countermagic, the Regent comes down as quickly as turn three and is extremely difficult to interact with, making them the perfect build around in a format with such a deep card pool as Modern
It might have got him into the game, but at very least it was an overlap on some of our favorite franchises. Quite a lot of other replies mention a similar issue, with long-time players wishing to introduce friends and family to Magic via their favorite non-MTG franchise
It will see heavy sideboard play, and when the metagame shifts towards fast combo, its a fine maindeck card
In Saturdays MTGO Modern League, MahfuzVanGogh piloted a Dredge list running the card to a 5-0 finish
It returned once, for the 25th anniversary in October 2021: Celebrations reprinted the POP Series 5 Umbreon in its Classic Collection and added one new card, Greninja (SWSH144), in Celebrations Elite Trainer Boxes