While many Unhinged cards tended to be deliberately confusing (Ambiguity, Staying Power, etc.) most of the best spells in Unstable are just a breath away from being able to be printed in a black-bordered set, and I doubt too many casual playgroups are going to mind if you play with them
MTGA does have lots of conditional tutors (including several in the ranking) that get a specific card type or subtype of cards like Solve the Equation
Thats where the Orrery and the Leyline come in
Description[] Copying permanents[] Effects that copy permanents either cause a card to enter the battlefield as a copy, change an existing object into a copy, or create a token copy
Damnation [Clean and Unconditional Board Wipe] Damnation is blacks clean answer to creature-heavy boards
That damage can add up, and it lets you play a little bit of politics by encouraging other players to attack the enchanted player