One thing this set has in common with Tales of Middle Earth is an eye for creative card effects that bring home the theme While there are lots of great thematic cards to enjoy, because this set is part of the standard format, you have to consider how the various effects will integrate with other releases for the game
While the cost of dual lands make it hard to do on a budget, both blue-white and blue-black mill could go a long way to solving the deck's aggro issue by adding sweepers, hard removal, and / or lifegain to the sideboard
It could be an Emrakul, the Aeons Torn, or perhaps that Placid Rottentail will hop right back out
Hades is a more straightforward payoff that removes a character from play by putting it into their controllers inkwell, and then sticks around after to quest and challenge
Thankfully, WotCs R&D team and artists should still do the franchise justice, albeit with their own unique spin