As such, attack normally, but then use combat tricks to buff your creatures up to destroy blockers with vigilance
1 Traditional Foil card
Once you have enough mana, you can use Svella, Ice Shaper's other ability to play free spells from the top four cards of your deck each turn
It's possible that Hour of Devastation prices are low because the set simply isn't that powerful for Standard and most cards from the set are unlikely to find homes in tier decks, since Energy and Vehicles are still dominating Standard, and Hour of Devastation doesn't interact particularly well with either mechanic
Mutant is a broad enough creature type that this creature will get many triggers, and each of those triggers plays into all the strategies Ive mentioned before
Since the ability says that you repeat its ability whenever you hit a land, youre guaranteed to get a free nonland permanent