This can be a complete game-changer if played right, but you have to protect Eiganjo Dynastorian long enough to get it prepared and cast the spell first
It enters the battlefield with six 1/1 counters, so for two colorless, one black and one green, youre getting bang for your mana
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
Is Job Select a Triggered Ability
You also lose life when you cast your spells, but hey, you have a big flying lifelink angel at your side
For example, when you forage, you can sacrifice Carrot Cake