Golem's Heart 
Artifact
$0.24 #13415 0.00 15.9 years
Whenever a player casts an artifact spell, you may gain 1 life.
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Urza's Chalice96%
$1.19↑#23983↓0.24↑32.5 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."
Citanul Druid85%
$8.63↑#28175↓0.53↑32.5 years↑
"Whenever an opponent casts an artifact spell, put a +1/+1 counter on this creature."
Fangren Marauder84%
$0.42↑#6535↑0.39↑15.6 years
"Whenever an artifact is put into a graveyard from the battlefield, you may gain 5 life."
Infested Roothold82%
$0.26↑#22994↓0.0022.6 years↑
"Whenever an opponent casts an artifact spell, you may create a 1/1 green Insect creature token."
Leonin Elder80%
$0.33↑#8032↑0.29↑22.9 years↑
"Whenever an artifact enters, you may gain 1 life."
Powerleech76%
$19.83↑#21538↓0.0632.5 years↑
"Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without 
in its activation cost, you gain 1 life."
in its activation cost, you gain 1 life."
Kraken's Eye75%
$0.10↓#156090.25↑22.6 years↑
"Whenever a player casts a blue spell, you may gain 1 life."
Demon's Horn74%
$0.23↓#6483↑0.0022.6 years↑
"Whenever a player casts a black spell, you may gain 1 life."
Wurm's Tooth74%
$0.13↓#142470.36↑22.6 years↑
"Whenever a player casts a green spell, you may gain 1 life."
Sol'kanar the Swamp King74%
$0.16↓#19706↓0.12↑32.3 years↑
"Whenever a player casts a black spell, you gain 1 life."
Angel's Feather74%
$0.19↓#10131↑0.0022.6 years↑
"Whenever a player casts a white spell, you may gain 1 life."
Lifesmith74%
$0.10↓#30093↓0.47↑15.9 years
"Whenever you cast an artifact spell, you may pay . If you do, you gain 3 life."
. If you do, you gain 3 life."
Kor Firewalker74%
$0.18↓#24914↓0.29↑16.6 years
"Whenever a player casts a red spell, you may gain 1 life."
Dragon's Claw74%
$0.20↓#139850.0022.6 years↑
"Whenever a player casts a red spell, you may gain 1 life."
Paradise Plume73%
$0.20↓#109730.0019.9 years↑
"Whenever a player casts a spell of the chosen color, you may gain 1 life."
Rewards of Diversity73%
$0.43↑#21851↓0.0625.9 years↑
"Whenever an opponent casts a multicolored spell, you gain 4 life."
Jeweled Torque73%
$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."
April O'Neil, Human Element73%
$4.15↑#127070.000.5 years↓
"Whenever a player casts an artifact, instant, or sorcery spell, you create a Mutagen token."
Sunscorch Regent72%
$0.30↑#1686↑0.29↑11.4 years↓
"Whenever an opponent casts a spell, put a +1/+1 counter on this creature and you gain 1 life."
Soldier of the Pantheon72%
$0.22↓#17142↓0.41↑12.9 years↓
"Whenever an opponent casts a multicolored spell, you gain 1 life."