So lets check out what else made the cut for the most expensive MTG cards
While "spell" does include creatures, artifacts, and enchantments in the context of Rolling Attack, the inclusion of Electric Thunder really promotes buffing him up with spells like Titan's Strength, Brute Force, Samut's Sprint, and Infuriate to keep the damage going to every character possible
This means cards like Mycosynth Lattice and Encroaching Mycosynth make all your spells historic
(Not even in that strange monstrosity above, where I even added a lot of creatures with a colorless casting cost to make Channel stronger)
You play a long game in which you win with massive threats like Hullbreaker Horror and Lochmere Serpent
You just need another creature of yours to be untapped