There are several ways to collect cards in Magic Online - Boosters, Treasure Chests, Account Kits, Preconstructed Decks, and more
Theres something less straightforward about them, something more akin to the old days of MTG when cards had real drawbacks
Ive seen it in a few different varieties, from Bant soldiers to legends-matter
Requisition Raid lets you: Destroy an artifact Destroy an enchantment Put a +1/+1 on each creature a player controls, usually yours but you never know
In 2020, one collector bought the first version of the Charizard card for $220,000
Its better once you get to 12+ charge counters, of course, but this card is useful even if you tap a mere bear to it