Chromatic Lantern 
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
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Cards that do something similar expected a card that isn't here?
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Greenhouse // Rickety Gazebo 100%
$0.22#6609
"Lands you control have "{T}: Add one mana of any color.""
Mystic Skull // Mystic Monstrosity 100%
$0.14#16293
"Lands you control have "{T}: Add one mana of any color.""
+1 more matching line
The World Tree 87%
$5.67#801
"As long as you control six or more lands, lands you control have "{T}: Add one mana of any color.""
Resonating Lute 85%
$1.53#3793
"Lands you control have "{T}: Add two mana of any one color. Spend this mana only to cast instant and sorcery spells.""
Divergent Growth 80%
$0.13#26224
"Until end of turn, lands you control gain "{T}: Add one mana of any color.""
Great Divide Guide 80%
$0.95#3067
"Each land and Ally you control has "{T}: Add one mana of any color.""
Undiscovered Paradise 84%
$37.68#16827
"{T}: Add one mana of any color. During your next untap step, as you untap your permanents, return this land to its owner's hand."
Biophagus 81%
$17.01#2875
"{T}: Add one mana of any color. If this mana is spent to cast a creature spell, that creature enters with an additional +1/+1 counter on it."