Futurist Operative
Creature — Human Ninja
As long as this creature is tapped, it's a Human Citizen with base power and toughness 1/1 and can't be blocked.
: Untap this creature.
"The Imperials can't arrest you for illegal tech if you never even existed."
Justine Cruz
Rulings
Effects 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.
(wotc • 2022-02-18)
Untapping Futurist Operative once it's been declared as an attacker won't remove it from combat.
(wotc • 2022-02-18)
Rulings
Effects 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.
(wotc • 2022-02-18)
Untapping Futurist Operative once it's been declared as an attacker won't remove it from combat.
(wotc • 2022-02-18)