Baba Lysaga, Night Witch Baba Lysaga, Night Witch doesnt just want you to sacrifice creatures
While 10 mana is a lot, starting with an indestructible, hexproof Dragonlord's Fervent in the command zone is a pretty sweet deal, and if you ever actually cast The Ur-Dragon, it should only take a single attack to close out the game
Doubling Season is a 1/882 as a Confetti foil as well as being a 1/1500 for a Fracture Foil, and the Fracture version is about three times as expensive
Aclazotz, Deepest Betrayal comes back as a land called Temple of the Dead that can transform back, which is a great way to evade commander tax if youre running a mono-black deck
Velomachus Lorehold Our only Boros Elder Dragon hits the first spot in my Top 10 proper
A big, beefy body (9/9) with three notable keywords (vigilance, reach, trample) that allows you untap all lands you control when it enters if cast plus three strong activated abilities means youll always be happy to throw this fatty down especially if you can cast it early via ramp