Cheapest priced copy (Jumpstart 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Watertrap Weaver 
Creature — Merfolk Wizard · 2/2 · Common · Ixalan · #87
When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart 2022 | 370 | Common | $0.35 | — |
| Ixalan | 87 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 29 September 2017Watertrap Weaver’s ability can target a creature that’s already tapped. That creature won’t untap during its controller’s next untap step.