The War Band costs six mana, at base rate, but can be discounted by one mana per opponent damaged in any given turn
It does take a lot to get it to that point, but dropping three artifacts onto the battlefield can end the game
It doesn't gain keyword abilities (unless those keyword abilities are activated), triggered abilities, or static abilities
Its fun, flavorful, and easy to understand
Modern Horizons 3 is packing a ton of Landfall support, meaning that this Commander can push the games tempo in its controllers favor right away
I'll go on about the Mega Hyper Rare in a moment, but the rest of Phantasmal Flames' crop of IRs, SIRs, and URs are more than good enough to make this set worth buying