They're fodder, things to challenge your opponent with while your Inventors push you to victory
It can play aggressively or as a mini-combo deck with reanimator lines, and it looks like a blast to play
So what's been making it such a strong performer
Ill put some of the highlights in order, then gold, just for people to know what they can expect out of these: Kenrith, the Returned King Akroma's Will Urza, Lord High Artificer Counterspell Cryptic Command Rhystic Study Yawgmoth, Thran Physician Bolas's Citadel K'rrik, Son of Yawgmoth Ragavan, Nimble Pilferer Ancient Copper Dragon Primeval Titan Atraxa, Grand Unifier Tymna the Weaver Isshin, Two Heavens as One Thrasios, Triton Hero #45
The ability that defines Avalanche of Sector 7's power applies in all zones, not just the battlefield