what is considered a card type mtg does mean in Magic: The Gathering? MTG card types explained -

Sanctum Weaver Sanctum Weaver is a color-shifted Serra's Sanctum on a 2-drop on a stick

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)

get all 40 and make the table tremble

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

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