D&D isn't technically a Universes Beyond property, but it is an outside-of-Magic domain that feels appropriate for one of these Standard release slots
There will also be amazing, full art Seasonal Land cards, with Summer and Winter cards shown below
The Firemind was almost always built as a Wheel deck, looking to string together cards like Wheel of Fortune and Windfall which allowed Niv to machine-gun down opposing creatures (and players) while digging for their Curiosity Combo: enchant Niv-Mizzet, the Firemind with Curiosity and then draw a card any way (like tapping Niv-Mizzet) to deal one damage to a player and draw one card as many times as you'd like, often killing all opponents in the process
That can still be a blessing, though, as the generic tokens theme is very open to different splashes or simply a fundamental, removal-and-good-cards approach to drafting
Consider what they discard, what they create, and how well they help the rest of your deck do what it already does best
Several cards refer specifically to villainous choices, so the keyword action is designed with intention as opposed to a non-keyworded effect like on Torment of Hailfire