Compressed Vice: In Episode 15 of Season 1, Jaden's love of competition does not extend to Tennis, which he spends the entire episode hating - and being uncharacteristically grumpy about - due to having it having nothing to do with dueling - which was not helped by being forced to join the Tennis club for a day as punishment for Crowler being hit in the eye with a tennis ball - which was started by Jaden's bad serve
THE CHROMATIC PROJECT Mono-Color Heliod, God of Enchantments
Having alternative formats in a game is common
Compared to promo cards or set cards for example
On top of that, all those 1/1 tokens you just cast gain haste
Consider cards like Resilient Khenra, Quarry Beetle, Hour of Promise, Sand Strangler, Without Weakness, Doomfall, Hour of Glory, Tragic Lesson (for your landfall triggers), Strategic Planning (for filling up your graveyard), Countervailing Winds, Saving Grace, and the cycling Deserts as good examples of the utility that Hour of Devastation has