The only issue, assuming you don't consider costing ten mana an issue, is that resolving four cascades in a row can get complicated, especially when individual cascades hit other cascade spells mid-resolution
Each card will still fit into a theme, and you can still mix those themes together to create a new deck and then battle it out with your friends
Ozolith, the Shattered Spire, Kami of Whispered Hopes, and some of the pricier Hydras like Benevolent Hydra and Primordial Hydra are excellent reprints for +1/+1 counter decks, and Tanazir Quandrix as the obligatory Elder Dragon inclusion (which I've just realized was conspicuously absent from Lorehold) makes me nostalgic for my prerelease promo Tanazir deck that aimed to make the biggest Fractal possible
Vigilance and reach means this dominates on offense and defense, while ward 2 gives it just the right amount of protection to let it stick around for a bit
However, tribal Commander decks regularly make use of Herald's Horn, since it accrues value over time, can be cast with any type of mana, and can benefit any tribe
I built mine around Auras because it felt more unique than using creatures