Sea Kings' Blessing 
Instant
$5.68 #25549 0.14 32.4 years
One or more target creatures become blue until end of turn.
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Heaven's Gate94%
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"One or more target creatures become white until end of turn."
Dwarven Song94%
$3.68↓#298750.2032.4 years
"One or more target creatures become red until end of turn."
Touch of Darkness94%
$10.28↑#18081↑0.00↓32.4 years
"One or more target creatures become black until end of turn."
Sylvan Paradise93%
$13.76↑#274410.2032.4 years
"One or more target creatures become green until end of turn."
Sway of Illusion90%
$0.52↓#18880↑0.00↓26.0 years↓
"Any number of target creatures become the color of your choice until end of turn."
Quickchange88%
$0.16↓#228750.38↑21.0 years↓
"Target creature becomes the color or colors of your choice until end of turn."
Tidal Visionary85%
$0.20↓#20391↑0.1926.0 years↓
"
: Target creature becomes the color of your choice until end of turn."
: Target creature becomes the color of your choice until end of turn."
Indigo Faerie84%
$0.18↓#284770.00↓18.2 years↓
": Target permanent becomes blue in addition to its other colors until end of turn."
: Target permanent becomes blue in addition to its other colors until end of turn."
Serpentine Ambush84%
$0.12↓#18736↑0.00↓4.9 years↓
"Until end of turn, target creature becomes a blue Serpent with base power and toughness 5/5."
Cerulean Wisps83%
$0.58↓#4549↑0.1118.5 years↓
"Target creature becomes blue until end of turn. Untap that creature."
Turn to Frog82%
$0.18↓#9066↑0.29↑15.3 years↓
"Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1."
Prismwake Merrow82%
$0.09↓#305500.1118.5 years↓
"When this creature enters, target permanent becomes the color or colors of your choice until end of turn."
Ersatz Gnomes81%
$0.20↓#280790.1130.0 years↓
": Target spell becomes colorless."
: Target spell becomes colorless."
Viridescent Wisps80%
$0.27↓#13370↑0.1518.5 years↓
"Target creature becomes green and gets +1/+0 until end of turn."
Prismatic Lace80%
$4.70↓#223860.1130.0 years↓
"Target permanent becomes the color or colors of your choice."
Moonlace80%
$0.35↓#17877↑0.32↑20.0 years↓
"Target spell or permanent becomes colorless."
Startling Development80%
$0.10↓#217160.00↓6.5 years↓
"Until end of turn, target creature becomes a blue Serpent with base power and toughness 4/4."
Polymorphist's Jest80%
$8.06↑#4643↑0.58↑12.3 years↓
"Until end of turn, each creature target player controls loses all abilities and becomes a blue Frog with base power and toughness 1/1."
Fractalize80%
$0.21↓#18626↑0.02↓0.5 years↓
"Until end of turn, target creature becomes a green and blue Fractal with base power and toughness each equal to X plus 1."
Illusion // Reality80%
$0.09↓#288410.1225.4 years↓
"Target spell or permanent becomes the color of your choice until end of turn."