Reins of Power 
Instant
$1.79 #3930 0.74 28.5 years
Untap all creatures you control and all creatures target opponent controls. You and that opponent each gain control of all creatures the other controls until end of turn. Those creatures gain haste until end of turn.
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Cards similar to Reins of Power expected a card that isn't here?
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Twist Allegiance95%
$0.40↓#22403↓0.58↓21.6 years↓
"You and target opponent each gain control of all creatures the other controls until end of turn. Untap those creatures. Those creatures gain haste until end of turn."
Insurrection90%
$8.70↑#1851↑1.08↑23.9 years↓
"Untap all creatures and gain control of them until end of turn. They gain haste until end of turn."
Call for Aid90%
$0.27↓#7372↓0.31↓3.2 years↓
"Gain control of all creatures target opponent controls until end of turn. Untap those creatures. They gain haste until end of turn. You can't attack that player this turn. You can't sacrifice those creatures this turn."
Mass Mutiny85%
$0.38↓#6989↓0.58↓14.3 years↓
"For each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain haste until end of turn."
Molten Primordial84%
$1.35↓#5664↓0.41↓13.6 years↓
"When this creature enters, for each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain haste until end of turn."
Threaten84%
$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."
Act of Treason84%
$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."
Traitorous Instinct82%
$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."
Blind with Anger82%
$0.23↓#20139↓0.6821.9 years↓
"Untap target nonlegendary creature and gain control of it until end of turn. That creature gains haste until end of turn."
Claim the Firstborn82%
$0.23↓#6850↓0.31↓6.9 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."
Harness by Force81%
$0.33↓#13749↓0.87↑12.3 years↓
"Gain control of any number of target creatures until end of turn. Untap those creatures. They gain haste until end of turn."
Spreading Insurrection80%
$0.22↓#12698↓0.25↓5.2 years↓
"Gain control of target creature you don't control until end of turn. Untap that creature. It gains haste until end of turn."
Mark of Mutiny80%
$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 Manticore80%
$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."
Wrangle80%
$0.16↓#12898↓0.729.6 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."
Bringer of the Red Dawn79%
$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."
Bond of Passion78%
$0.05↓#23737↓0.33↓7.3 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. this card deals 2 damage to any other target."
Press into Service78%
$0.18↓#23045↓0.26↓10.6 years↓
"Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn."
Captivating Crew78%
$0.25↓#34860.52↓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."
Might Makes Right78%
$0.09↓#22197↓0.25↓12.1 years↓
"At the beginning of combat on your turn, if you control each creature on the battlefield with the greatest power, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn."