When Atlantean Dragoons is sent to the GY to activate the effect of a Water monster, players can add a Sea Serpent-type monster to their hand , which allows them to easily continue combos
Four will be rares, one from each of the sets remaining in Standard ( Zendikar Rising , Kaldheim , Strixhaven: School of Mages , and Adventures in the Forgotten Realms ), and the remaining six will include five rares and one mythic rare from Innistrad: Midnight Hunt
TCG Event Coverage (Europe): World Championship 2011 Dueling Days
While forcing players to pay an extra mana to put burden counters on it may not sound like a big deal, for decks like Rakdos Midrange that would normally slam the card turn four, the extra mana can be a big deal
(9/24/2021) Once a creature with decayed attacks, it will be sacrificed at end of combat, even if it no longer has decayed at that time.
I dont know if thats enough to keep up with a broader metagame, but its an interesting concept