2 Marchesa, the Black Rose I like Marchesa so much that I've already published a Commander deck built around her
The two share lifegain, creature boosting, enchantment (and, to a lesser extent for white, artifact) removal, vigilance, damage prevention (with green's being Fog effects), adding +1/+1 counters, untapping creatures, and other small effects
Being able to search out the Supporter that you want to play to put in your discard pile makes this a fully self-contained archetype that has been played on its own, but has also seen a hybrid deck with Dragapult ex [Twilight Masquerade] or Gholdengo ex [Paradox Rift]
Ancient Adamantoise #172 Magic Final Fantasy Keep track of your collection value over time
This card costs X less to cast, where X is the combined mana value of all Historic permanents you control meaning Artifacts, Legendaries, and Sagas
11 Number 38: Hope Harbinger Dragon Titanic Galaxy On top of having a mouthful of a name, Number 38: Hope Harbinger Titanic Galaxy is the best Rank Eight Xyz Monster out there