Into: The Altar of Thraximundar For: Cryptic Command (to Kynaios and Tiro) There are a few things at play here
In 2023, theres no question that Accorders Shield was the worst example of this
For the cost of seven mana, this Slug Horror states that at the beginning of each player's upkeep, a slime counter is put on each creature you don't control, with each creature getting -1/-1 for each slime counter on it
$20.99 Iona, Shield of Emeria From the Vault: Angels $13.99 Iona, Shield of Emeria Modern Masters 2015 $2.99 Otherworldly Gaze Innistrad: Midnight Hunt $10.99 Griselbrand Innistrad Remastered $29.99 Atraxa, Grand Unifier (316 - Borderless Ichor) Phyrexia: All Will Be One Variants $44.99 Lotus Petal Tempest $11.99 Griselbrand Avacyn Restored $159.99 Shallow Grave Mirage $2.79 Faithful Mending Innistrad: Midnight Hunt $0.99 Kami of False Hope Betrayers of Kamigawa $1.49 Restoration Angel (Release Foil) Promotional $9.49 Griselbrand (160 - Foil) Secret Lair 0 results found
Like every other set release, MTG | Avatar: The Last Airbender introduces new (and returning) mechanics to the tabletops of Magic: the Gathering
Currently, theres only one Constructed format, but more may be added in the future