Cheapest priced copy (Time Spiral Remastered): $0.49 at Card Kingdom, near mint, their price list as of .
Magus of the Future 
Creature — Human Wizard · 2/3 · Rare · Future Sight · #40
Play with the top card of your library revealed.
You may play lands and cast spells from the top of your library.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Future Sight | 40 | Rare | $0.79 | $2.49 |
| Time Spiral Remastered | 75 | Rare | $0.49 | $0.49 |
6 rulings from Wizards of the Coast
- 19 March 2021You still pay all costs for a spell you cast from your library, including additional costs. You may also pay alternative costs.
- 19 March 2021Magus of the Future doesn't change when you can play lands. You can do so only during your main phase when you have priority and the stack is empty.
- 19 March 2021The top card of your library is still in your library and not in your hand. You can't discard or suspend cards from the top of your library, for example.
- 19 March 2021If the top card of your library changes while you're casting a spell, playing a land, or activating an ability, you don't reveal the new top card until you finish doing so. This means that if you cast the top card of your library, you can't look at the next one until you're done paying for that spell; and if you play a land from the top of your library, you can't look at the next card until you're done handling any replacement effects that modify how that land enters the battlefield (such as that of Vesuva).
- 19 March 2021You must follow the normal timing permissions and restrictions of the spells you cast from your library.
- 19 March 2021Playing a land from the top of your library counts as your land play for the turn. Once you play a land during your turn, you won't be able to play an additional land from the top of your library unless another effect (such as that of Azusa, Lost but Seeking) allows you to.