Sea Kings' Blessing 
Instant
$5.65 #25316 0.29 32.3 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%
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"One or more target creatures become red until end of turn."
Touch of Darkness94%
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"One or more target creatures become black until end of turn."
Sylvan Paradise93%
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"One or more target creatures become green until end of turn."
Sway of Illusion90%
$0.56↓#18744↑0.3125.9 years↓
"Any number of target creatures become the color of your choice until end of turn."
Quickchange88%
$0.15↓#227210.09↓20.9 years↓
"Target creature becomes the color or colors of your choice until end of turn."
Serpentine Ambush86%
$0.12↓#18385↑0.294.8 years↓
"Until end of turn, target creature becomes a blue Serpent with base power and toughness 5/5."
Tidal Visionary85%
$0.15↓#202660.2925.9 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↓#281740.2518.1 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."
Cerulean Wisps83%
$0.70↓#4520↑0.2918.3 years↓
"Target creature becomes blue until end of turn. Untap that creature."
Turn to Frog82%
$0.18↓#8889↑0.00↓15.1 years↓
"Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1."
Prismwake Merrow82%
$0.07↓#303000.2418.3 years↓
"When this creature enters, target permanent becomes the color or colors of your choice until end of turn."
Ersatz Gnomes81%
$0.23↓#279080.2129.9 years↓
": Target spell becomes colorless."
: Target spell becomes colorless."
Polymorphist's Jest80%
$6.99↑#4554↑0.3512.1 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."
Prismatic Lace80%
$4.30↓#222300.65↑29.9 years↓
"Target permanent becomes the color or colors of your choice."
Moonlace80%
$0.45↓#17725↑0.2819.9 years↓
"Target spell or permanent becomes colorless."
Viridescent Wisps80%
$0.25↓#13069↑0.45↑18.3 years↓
"Target creature becomes green and gets +1/+0 until end of turn."
Startling Development80%
$0.10↓#214090.276.4 years↓
"Until end of turn, target creature becomes a blue Serpent with base power and toughness 4/4."
Fractalize80%
$0.15↓#18947↑0.00↓0.4 years↓
"Until end of turn, target creature becomes a green and blue Fractal with base power and toughness each equal to X plus 1."
Incite80%
$0.07↓#274610.44↑16.1 years↓
"Target creature becomes red until end of turn and attacks this turn if able."