Cheapest priced copy (Edge of Eternities): $0.35 at Card Kingdom, near mint, their price list as of .
Atomic Microsizer 
Artifact — Equipment · Uncommon · Edge of Eternities · #47
Equipped creature gets +1/+0.
Whenever equipped creature attacks, choose up to one target creature. That creature can't be blocked this turn and has base power and toughness 1/1 until end of turn.
Equip {2}
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Edge of Eternities | 47 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 25 July 2025The effect of Atomic Microsizer’s second ability will overwrite any previous effects that set the creature’s power and toughness to specific values. Effects that otherwise modify the target creature’s power and toughness will still apply no matter when they took effect. The same is true for +1/+1 counters.