Unbanning an extremely powerful and controversial card like Jace, the Mind Sculptor has the potential to hurt the format as a whole over the long term, which could mean that the short-term gains from selling a lot of Masters 25 will be outweighed by an overall decline in the format if the metagame devolves to Jace decks verses anti-Jace decks
it only matters what its power is when the ability resolves
However, players looking for specific games can find them in Commander preconstructed decks
This seems like one of the best learn cards
The original Dominaria had 97 historic cards to untap it
If you want to exploit landfall, a few choice landfall cards like Greensleeves, Maro-Sorcerer, Scute Swarm, and Springheart Nantuko let you take over the game while utilizing cards like Uro, Titan of Nature's Wrath and Risen Reef to make all those extra land drops