The creatures in the Challenger Deck are mostly on point, minus a couple of extra copies of Murderous Rider and Lovestruck Beast, while the main expense is improving the mana base with a playset of Overgrown Tomb (which thankfully is one of the cheaper shock lands, at only $46 for all four copies)
The Engine Brainstorm and Ponder are automatic four-ofs in any Miracle build
Sword of Forge and Frontier Land and card draw The Swords of series in Magic: The Gathering run a gamut of usefulness, but all of them cost three mana, grant protection from two colours, add +2/+2 and provide some kind of benefit if you can hit a player with a creature equipped with them
Still, that's a small gripe when this deck is as strong as it truly is
Where I think this is very strong is with planeswalkers that target your leader, like Basri Ket's +1 to put a +1/+1 counter on it, now your team for two more mana
Sylveon ex 156/131 Sylveon ex bursts with soft colours and ribbon-like shapes that create a dreamy, elegant impression