mtg ally cards 6 | Clue 17 - Double Sided Token - Avatar: TLA Put five +1/+1 counters on it Avatar's Allies Will Change Ally

Spark Double also seems key, since Gyruda, Doom of Depths triggers whenever it enters the battlefield if you can mill a reanimate a Spark Double you can make a non-lgendary copy of Gyruda, Doom of Depths, giving you another enters the battlefield trigger to repeat the process

Its easy, its simple, and its disrespectful

Not only is Glorybringer a perfect target for Saheeli Rais -2 ability, as the token can be exerted without concern, but even Felidar Guardian can reset an Exerted Glorybringer to allow it to keep attacking and breathing fire all over your opponents battlefield

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just be warned that its possible the lands gets reprinted, maybe as soon as Commander Legends 2