what is considered a card type mtg does mean in Magic: The Gathering? What Types of Cards Exist

For the Commander (2021 Edition) rares and mythic rares, the Collector Booster has a dedicated single slot (in addition to the slot above) that will always have a non-foil extended-art version containing one of the new rare and mythic rare cards from the five Commander (2021 Edition) decks

Anyway, Amulet of Safekeeping is probably good enough to see at least marginal Modern and even Legacy sideboard play

DMU features several rares that ask you to build around a specific tribe, but almost all of those are completely unsupported by the rest of the set (shoutout to soldiers as an exception)

5 Fabled All Or Nothing Nails the soft-rest of competitive play following a set rotation

This isn't super exciting since we don't have many expensive things to ramp into, but it still makes two energy when it enters the battlefield, so even if we don't ever use it to make mana, it's still supporting our deck's theme and powering up our other cards