Cheapest priced copy (Masters 25): $0.35 at Card Kingdom, near mint, their price list as of .
Act of Treason 
Sorcery · Common · Core Set 2020 · #124
Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
17 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Masters 25 | 118 | Common | $0.35 | $0.49 |
| Duel Decks: Speed vs. Cunning | 26 | Common | $0.35 | — |
| Duels of the Planeswalkers | 37 | Uncommon | $0.35 | — |
| Gatecrash | 85 | Common | $0.35 | $0.49 |
| Jumpstart | 289 | Common | $0.35 | — |
| Khans of Tarkir | 95 | Common | $0.35 | $0.49 |
| Magic 2010 | 124 | Uncommon | $0.35 | $0.49 |
| Magic 2011 | 121 | Common | $0.35 | $0.49 |
| Magic 2012 | 121 | Common | $0.35 | $0.49 |
| Magic 2014 | 125 | Common | $0.35 | $0.79 |
| Core Set 2019 | 127 | Common | $0.35 | $0.49 |
| Core Set 2020 | 124 | Common | $0.35 | $0.49 |
| Magic Origins | 129 | Common | $0.35 | $0.49 |
| The List | RNA-91 | Common | $0.35 | — |
| Salvat 2011 | 90 | Uncommon | — | — |
| Ravnica Allegiance | 91 | Common | $0.35 | $0.49 |
| Ravnica Remastered | 99 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 12 July 2019Act of Treason can target any creature, even one that's untapped or one you already control.
- 12 July 2019Gaining control of a creature doesn't cause you to gain control of any Auras or Equipment attached to it.