Kraken's Eye 
Artifact
$0.10 #15609 0.25 22.6 years
Whenever a player casts a blue spell, you may gain 1 life.
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Crystal Rod98%
$0.12↑#26717↓0.00↓33.1 years↑
"Whenever a player casts a blue spell, you may pay 
. If you do, you gain 1 life."
. If you do, you gain 1 life."
Glade Gnarr88%
$0.05↓#31511↓0.53↑25.3 years↑
"Whenever a player casts a blue spell, this creature gets +2/+2 until end of turn."
Eyes of the Wisent85%
$0.59↑#22472↓0.2518.9 years↓
"Whenever an opponent casts a blue spell during your turn, you may create a 4/4 green Elemental creature token."
Snake Pit80%
$0.32↑#139560.06↓26.9 years↑
"Whenever an opponent casts a blue or black spell, you may create a 1/1 green Snake creature token."
Demon's Horn78%
$0.23↑#6483↑0.00↓22.6 years
"Whenever a player casts a black spell, you may gain 1 life."
Sol'kanar the Swamp King78%
$0.16↑#19706↓0.12↓32.3 years↑
"Whenever a player casts a black spell, you gain 1 life."
Urza's Chalice78%
$1.19↑#23983↓0.2432.5 years↑
"Whenever a player casts an artifact spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Angel's Feather78%
$0.19↑#10131↑0.00↓22.6 years
"Whenever a player casts a white spell, you may gain 1 life."
Drowner Initiate78%
$0.28↑#22330↓0.38↑18.3 years↓
"Whenever a player casts a blue spell, you may pay . If you do, target player mills two cards."
. If you do, target player mills two cards."
Jeweled Torque77%
$0.22↑#30264↓0.13↓26.9 years↑
"Whenever a player casts a spell of the chosen color, you may pay . If you do, you gain 2 life."
. If you do, you gain 2 life."
Rewards of Diversity76%
$0.43↑#21851↓0.06↓25.9 years↑
"Whenever an opponent casts a multicolored spell, you gain 4 life."
Witchstalker76%
$0.25↑#19122↓0.2713.1 years↓
"Whenever an opponent casts a blue or black spell during your turn, put a +1/+1 counter on this creature."
Mold Adder76%
$0.11↑#145420.00↓17.1 years↓
"Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature."
Lapis Lazuli Talisman76%
$1.03↑#26371↓0.2931.3 years↑
"Whenever a player casts a blue spell, you may pay 
. If you do, untap target permanent."
. If you do, untap target permanent."
Soldier of the Pantheon76%
$0.22↑#171420.41↑12.9 years↓
"Whenever an opponent casts a multicolored spell, you gain 1 life."
Dragon's Claw76%
$0.20↑#139850.00↓22.6 years
"Whenever a player casts a red spell, you may gain 1 life."
Ivory Cup76%
$0.17↑#24920↓0.00↓33.1 years↑
"Whenever a player casts a white spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Apothecary Initiate76%
$0.16↑#23991↓0.2018.3 years↓
"Whenever a player casts a white spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Paradise Plume76%
$0.20↑#10973↑0.00↓19.9 years↓
"Whenever a player casts a spell of the chosen color, you may gain 1 life."
Kor Firewalker76%
$0.18↑#24914↓0.2916.6 years↓
"Whenever a player casts a red spell, you may gain 1 life."