Clock of Omens 
Artifact
$3.44 #1701 0.98 22.4 years
Tap two untapped artifacts you control: Untap target artifact.
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Goldfury Strider82%
$0.06↓#24869↓0.14↓2.9 years↓
"Tap two untapped artifacts and/or creatures you control: Target creature gets +2/+0 until end of turn. Activate only as a sorcery."
Voltaic Servant82%
$0.20↓#10361↓0.04↓8.5 years↓
"At the beginning of your end step, untap target artifact."
Lodestone Myr80%
$0.67↓#8693↓0.11↓23.0 years
"Tap an untapped artifact you control: This creature gets +1/+1 until end of turn."
Zahid, Djinn of the Lamp79%
$0.11↓#26072↓0.00↓8.5 years↓
"You may pay 
and tap an untapped artifact you control rather than pay this spell's mana cost."
and tap an untapped artifact you control rather than pay this spell's mana cost."
Filigree Sages79%
$0.69↓#13207↓0.13↓18.0 years↓
"
: Untap target artifact."
: Untap target artifact."
Secluded Starforge78%
$0.39↓#3662↓0.07↓1.2 years↓
", 
, Tap X untapped artifacts you control: Target creature gets +X/+0 until end of turn. Activate only as a sorcery."
, , Tap X untapped artifacts you control: Target creature gets +X/+0 until end of turn. Activate only as a sorcery."
Voltaic Key78%
$3.25↓#17160.64↓28.0 years↑
"
, : Untap target artifact."
, : Untap target artifact."
Citanul Stalwart77%
$0.19↓#10042↓0.06↓3.9 years↓
", Tap an untapped artifact or creature you control: Add one mana of any color."
, Tap an untapped artifact or creature you control: Add one mana of any color."
Adaptive Gemguard77%
$0.10↓#20898↓0.04↓2.9 years↓
"Tap two untapped artifacts and/or creatures you control: Put a +1/+1 counter on this creature. Activate only as a sorcery."
Manifold Key76%
$1.64↓#1015↑0.46↓7.3 years↓
", : Untap another target artifact."
, : Untap another target artifact."
Meria, Scholar of Antiquity74%
$0.26↓#10424↓0.06↓4.1 years↓
"Tap an untapped nontoken artifact you control: Add 
."
."
Ghirapur Aether Grid74%
$0.28↓#6708↓0.53↓11.3 years↓
"Tap two untapped artifacts you control: This enchantment deals 1 damage to any target."
Necron Overlord74%
$0.53↓#12785↓0.64↓4.0 years↓
"
, , Tap X untapped artifacts you control: Target opponent loses X life."
, , Tap X untapped artifacts you control: Target opponent loses X life."
Quicksmith Spy73%
$0.20↓#22353↓0.06↓9.7 years↓
"When this creature enters, target artifact you control gains ": Draw a card" for as long as you control this creature."
: Draw a card" for as long as you control this creature."
Tenured Tethermage72%
$0.31↓#17457↓0.10↓0.0 years↓
"Tap two untapped artifacts you control: Put two +1/+1 counters on this creature."
Galvanic Key72%
$0.25↓#19792↓0.25↓23.0 years
", : Untap target artifact."
, : Untap target artifact."
Whirler Rogue72%
$0.07↓#2240↓0.12↓11.3 years↓
"Tap two untapped artifacts you control: Target creature can't be blocked this turn."
Quicksmith Rebel71%
$0.11↓#27012↓0.06↓9.7 years↓
"When this creature enters, target artifact you control gains ": This artifact deals 2 damage to any target" for as long as you control this creature."
: This artifact deals 2 damage to any target" for as long as you control this creature."
Hyperion Blacksmith70%
$2.40↓#31976↓0.11↓32.4 years↑
": You may tap or untap target artifact an opponent controls."
: You may tap or untap target artifact an opponent controls."
Aphetto Alchemist70%
$2.78↓#4913↓0.00↓24.0 years↑
": Untap target artifact or creature."
: Untap target artifact or creature."