Its a decent engine for Golgari decks, and one that could easily start seeing play in decks like Aristocrats, where sacrifice outlets can enable the draw early
Having a six-mana Plague Wind that also Mind Twisted your opponent was backbreaking, especially when played on turn four or five, thanks to mana creatures
Expansion may only be able to copy smaller spells, but you can use the Explosion side to pull you miles ahead on the spot
Drift of Phantasms can find: Rhystic Study Necropotence Food Chain Basalt Monolith Toxic Deluge Ghostly Flicker Capsize Pulse of Murasa Fabricate Intruder Alarm Freed from the Real In Commander, Drift is best in decks where the 3-mana slot contains combo engines or major value pieces
Solaflora will likely be a lightning rod for removal, so be sure to include some equipment or auras that keep it safe
The nice part is that youre already attacking with a bunch of samurai to capitalize on the bonus, and most of them have bushido if theyre blocked, so its not going to end well for your opponent