When I first tried it in Modern, I wasnt impressed
Mother of Runes Another card that could easily be a staple of Historic and Brawl is Mother of Runes
Scion of the Ur-Dragon Foil, $74.01 Scion of the Ur-Dragon has always enjoyed a high foil multiplier, being the sole go-to commander for five-color dragons
Endbringer An Eldrazi that you have to pay 1 colorless, plus 5 more of any mana, this card untaps during each other player's untap step too
Not only will this make sure you get a lot of triggers off of the above cards, but it also means you can put Cavalcade of Calamity in your deck, which deals one damage to the player or planeswalker thats being attacked each time a creature you control with power one or less attacks
Enjoy the face-smashing of these game ending powers