Govern the Guildless 

Sorcery
$0.31 #23299 0.53 20.5 years
Gain control of target monocolored creature.
Forecast — 
, Reveal this card from your hand: Target creature becomes the color or colors of your choice until end of turn. (Activate only during your upkeep and only once each turn.)
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Entrancing Melody80%
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"Gain control of target creature with mana value X."
Prismatic Lace78%
$4.70↑#223860.11↓30.0 years↑
"Target permanent becomes the color or colors of your choice."
Dominate76%
$0.49↑#17247↑0.43↓26.7 years↑
"Gain control of target creature with mana value X or less."
Tidal Visionary74%
$0.20↓#203910.19↓26.0 years↑
"
: Target creature becomes the color of your choice until end of turn."
Lullmage's Domination74%
$0.08↓#201840.29↓6.1 years↓
"Gain control of target creature with mana value X."
Quickchange74%
$0.16↓#228750.38↓21.0 years
"Target creature becomes the color or colors of your choice until end of turn."
Keiga, the Tide Star72%
$0.36↑#4440↑0.6122.1 years↑
"When this card dies, gain control of target creature."
Alchor's Tomb72%
$17.97↑#29452↓0.24↓32.4 years↑
"
,
: Target permanent you control becomes the color of your choice."
Dream Coat72%
$2.79↑#274710.12↓32.4 years↑
"
: Enchanted creature becomes the color or colors of your choice. Activate only once each turn."
Exert Influence72%
$0.12↓#259990.38↓11.0 years↓
"Gain control of target creature if its power is less than or equal to the number of colors of mana spent to cast this spell."
Sower of Temptation71%
$2.66↑#4108↑0.5819.0 years↓
"When this creature enters, gain control of target creature for as long as this creature remains on the battlefield."
Sea Kings' Blessing70%
$5.68↑#255490.14↓32.4 years↑
"One or more target creatures become blue until end of turn."
Startling Development70%
$0.10↓#217160.00↓6.5 years↓
"Until end of turn, target creature becomes a blue Serpent with base power and toughness 4/4."