Energy Tap 
Sorcery
$0.28 #8204 0.78 32.4 years
Tap target untapped creature you control. If you do, add an amount of 
equal to that creature's mana value.
equal to that creature's mana value.Click a line or tag to filter
Cards similar to Energy Tap expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Channel the Suns81%
$0.70↑#16911↓0.00↓22.4 years↓
"Add 
."
."
Seething Song80%
$9.00↑#299↑0.56↓23.0 years↓
"Add ."
."
Sacrifice79%
$4.60↑#2858↑0.32↓33.2 years
"Add an amount of equal to the sacrificed creature's mana value."
equal to the sacrificed creature's mana value."
Battle Hymn78%
$1.80↑#1658↑0.36↓14.5 years↓
"Add for each creature you control."
for each creature you control."
Pyretic Ritual77%
$6.03↑#709↑0.34↓16.3 years↓
"Add ."
."
Infernal Plunge76%
$0.41↑#3044↑0.38↓15.1 years↓
"Add ."
."
Burnt Offering76%
$1.59↑#3125↑0.26↓31.4 years↓
"Add X mana in any combination of and/or , where X is the sacrificed creature's mana value."
and/or , where X is the sacrificed creature's mana value."
Blazing Firesinger // Seething Song76%
$0.38↑#5014↑0.05↓0.5 years↓
"Add ."
."
Cabal Ritual74%
$14.93↑#442↑0.54↓24.7 years↓
"Add ."
."
Geosurge74%
$4.06↑#6161↑0.7115.4 years↓
"Add . Spend this mana only to cast artifact or creature spells."
. Spend this mana only to cast artifact or creature spells."
Liturgy of Blood70%
$0.05↓#18867↓0.06↓13.3 years↓
"Destroy target creature. Add ."
."
Desperate Ritual70%
$6.11↑#950↑0.30↓22.1 years↓
"Add ."
."