mtg meta commander decks Magic: the Gathering or unleash Eldrazi to devour all in your path with Eldrazi Incursion Wizards of The Coast Magic:

Even if you gain control of your opponents Artifacts, reaching the 20 Artifact requirement should still be very hard

Graded Population Report: Wakka, Devoted Guardian [Foil] #97 Visualize the distrbution of grades in the chart

These formats have access to almost all cards from Magics history , so players who are interested in playing need to have pretty big collections to get involved

The most obviously powerful one of these is Syvelun of Sea and Sky, which is basically an indestructible merfolk that draws cards and helps protect your other creatures

Then the recently printed Offering costs two too, also sacrifices both, and this time leaves you a Map token to either draw the top land of your library for a three for one, or give a dork a +1/+1 counter