Golem's Heart 
Artifact
$0.24 #13488 0.06 16.1 years
Whenever a player casts an artifact spell, you may gain 1 life.
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Urza's Chalice96%
$1.11↑#24159↓0.0632.6 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%
$8.33↑#28629↓0.21↑32.6 years↑
"Whenever an opponent casts an artifact spell, put a +1/+1 counter on this creature."
Fangren Marauder84%
$0.40↑#6606↑0.1115.7 years
"Whenever an artifact is put into a graveyard from the battlefield, you may gain 5 life."
Infested Roothold82%
$0.26↑#23270↓0.22↑22.7 years↑
"Whenever an opponent casts an artifact spell, you may create a 1/1 green Insect creature token."
Leonin Elder80%
$0.38↑#7911↑0.0723.0 years↑
"Whenever an artifact enters, you may gain 1 life."
Solarium Sentry79%
$0.31↑#19077↓0.150.0 years↓
"Whenever an opponent casts a spell with mana value 2 or less, you gain 2 life."
Powerleech75%
$20.88↑#21624↓0.33↑32.6 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 Eye74%
$0.10↓#156760.0522.7 years↑
"Whenever a player casts a blue spell, you may gain 1 life."
Demon's Horn74%
$0.21↓#6565↑0.1222.7 years↑
"Whenever a player casts a black spell, you may gain 1 life."
Wurm's Tooth74%
$0.14↓#141410.0022.7 years↑
"Whenever a player casts a green spell, you may gain 1 life."
Sol'kanar the Swamp King74%
$0.17↓#20022↓0.1232.4 years↑
"Whenever a player casts a black spell, you gain 1 life."
Lifesmith74%
$0.18↓#30421↓0.0716.1 years
"Whenever you cast an artifact spell, you may pay . If you do, you gain 3 life."
. If you do, you gain 3 life."
Angel's Feather74%
$0.21↓#10015↑0.0622.7 years↑
"Whenever a player casts a white spell, you may gain 1 life."
Dragon's Claw74%
$0.20↓#140810.0022.7 years↑
"Whenever a player casts a red spell, you may gain 1 life."
Jeweled Torque73%
$0.24#30466↓0.25↑27.0 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."
Paradise Plume72%
$0.19↓#111500.0020.0 years↑
"Whenever a player casts a spell of the chosen color, you may gain 1 life."
Rewards of Diversity72%
$0.43↑#21896↓0.28↑26.0 years↑
"Whenever an opponent casts a multicolored spell, you gain 4 life."
Emissary of Hope72%
$0.24#27841↓0.0522.7 years↑
"Whenever this creature deals combat damage to a player, you gain 1 life for each artifact that player controls."
Kor Firewalker72%
$0.20↓#25224↓0.29↑16.7 years
"Whenever a player casts a red spell, you may gain 1 life."
April O'Neil, Human Element72%
$3.18↑#121490.39↑0.6 years↓
"Whenever a player casts an artifact, instant, or sorcery spell, you create a Mutagen token."