This ability not only lets you slowly take down your opponents strongest blockers, but it also works incredibly well with other decks like Yawgmoth, Thran Physician, which also spreads -1/-1 counters around for your benefit
Edgewall Pack puts two bodies onto the battlefield to enable Celebration, and getting four power and toughness for 3R is a great rate, too
The front side is probably stronger than the back and is what would make this card good
Its a mana-intensive affair, but theres no denying the impact and power of this fusion
Just like Jhoira earlier, I like him casting fat stuff for five mana, like Insurrection, Eldrazi Titans like Ulamog, Archangel's Light, Plague Wind, Searing Wind, the Ultimatum Cycle like Genesis Ultimatum, Conflux, Apex Devastator, Progenitus, Avacyn, Angel of Hope, the Ancient Dragon cycle, and loads more
Never have been, and yet The Infamous Cruelclaw makes me look at my pile of Rakdos bulk and question if I can accomplish the impossible (for me)