Cheapest priced copy (Dominaria United): $0.35 at Card Kingdom, near mint, their price list as of .
Impede Momentum 
Sorcery · Common · Dominaria United · #54
Tap target creature and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 54 | Common | $0.35 | $0.49 |
6 rulings from Wizards of the Coast
- 9 September 2022Stun counters replace untapping for any reason, including players untapping tapped permanents during their untap steps.
- 9 September 2022If a tapped permanent with a stun counter on it would become untapped, a stun counter will be removed from it instead. This is a replacement effect.
- 9 September 2022You may target a creature that is already tapped with Impede Momentum. If the target creature is tapped as it resolves, you will still put three stun counters on it.
- 9 September 2022If a permanent has more than one stun counter on it, only one will be removed each time it would become untapped.
- 9 September 2022If untapping a permanent is part of a cost (such as that of Halo Fountain’s first ability), you may pay that cost by “untapping” a tapped permanent with a stun counter on it. The stun counter will be removed and the creature will remain tapped. However, the cost will still be paid.
- 9 September 2022Abilities that trigger when a permanent “becomes untapped” won’t trigger if a stun counter is removed instead.