Cheapest priced copy (Kamigawa: Neon Dynasty): $0.35 at Card Kingdom, near mint, their price list as of .
Futurist Operative 
Creature — Human Ninja · 3/4 · Uncommon · Kamigawa: Neon Dynasty · #53
As long as this creature is tapped, it's a Human Citizen with base power and toughness 1/1 and can't be blocked.
{2}{U}: Untap this creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kamigawa: Neon Dynasty | 53 | Uncommon | $0.35 | $0.49 |
| Kamigawa: Neon Dynasty | 333 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 18 February 2022Effects that set a creature's power, toughness, or creature types will be applied in timestamp order. The timestamp of Futurist Operative's first ability is when it entered the battlefield, not when it became tapped. Notably, this means the ability will not overwrite any effects that set its power and toughness to specific numbers after it entered the battlefield. Effects that otherwise modify its power and toughness will still apply no matter when they took effect. The same is true for +1/+1 counters.
- 18 February 2022Untapping Futurist Operative once it's been declared as an attacker won't remove it from combat.