Act of Treason 
Sorcery
$0.05 #4765 0.38 17.1 years
Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and 
this turn.)
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Cards similar to Act of Treason expected a card that isn't here?
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Threaten100%
$0.26↑#15870↓0.58↑23.9 years↑
"Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn."
Traitorous Instinct99%
$0.10↑#19822↓0.22↓16.4 years
"Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gets +2/+0 and gains haste."
Claim the Firstborn98%
$0.23↑#6850↓0.316.9 years↓
"Gain control of target creature with mana value 3 or less until end of turn. Untap that creature. It gains haste until end of turn."
Blind with Anger97%
$0.23↑#20139↓0.68↑21.9 years↑
"Untap target nonlegendary creature and gain control of it until end of turn. That creature gains haste until end of turn."
Mark of Mutiny96%
$0.11↑#9638↓0.14↓16.9 years
"Gain control of target creature until end of turn. Put a +1/+1 counter on it and untap it. That creature gains haste until end of turn."
Conquering Manticore96%
$0.21↑#15745↓0.27↓16.4 years
"When this creature enters, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn."
Traitorous Blood95%
$0.13↑#11963↓0.24↓14.9 years↓
"Gain control of target creature until end of turn. Untap it. It gains trample and haste until end of turn."
Bringer of the Red Dawn95%
$1.93↑#20082↓0.11↓22.3 years↑
"At the beginning of your upkeep, you may untap target creature and gain control of it until end of turn. That creature gains haste until end of turn."
Captivating Crew94%
$0.25↑#3486↑0.52↑8.9 years↓
"
: Gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery."
: Gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery."
Wrangle94%
$0.16↑#12898↓0.72↑9.6 years↓
"Gain control of target creature with power 4 or less until end of turn. Untap that creature. It gains haste until end of turn."
Eriette's Tempting Apple94%
$0.32↑#8217↓0.443.0 years↓
"When this card enters, gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn."
Sarkhan Vol94%
$3.08↑#16233↓0.19↓17.9 years
"−2: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn."
Lose Calm94%
$0.17↑#22314↓0.2911.4 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste and menace until end of turn."
Twisted Fealty93%
$0.33↑#8026↓0.333.0 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn."
Mascot Interception93%
$0.08↑#22736↓0.455.4 years↓
"Gain control of target creature until end of turn. Untap that creature. It gets +2/+0 and gains haste until end of turn."
Limits of Solidarity92%
$0.23↑#21799↓0.60↑9.4 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn."
Traitorous Greed92%
$0.23↑#8777↓0.67↑6.2 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Add two mana of any one color."
Vengeful Possession92%
$0.28↑#8075↓0.371.9 years↓
"Gain control of target creature until end of turn. Untap it. It gains haste until end of turn. You may discard a card. If you do, draw a card."
Turn Against92%
$0.13↑#24909↓0.4310.9 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn."
Sauron, the Lidless Eye92%
$8.22↑#10847↓0.25↓3.2 years↓
"When this card enters, gain control of target creature an opponent controls until end of turn. Untap it. It gains haste until end of turn."