Behind the Mask 
Instant
$0.11 #18998 0.07 2.7 years
As an additional cost to cast this spell, you may collect evidence 6. (Exile cards with total mana value 6 or greater from your graveyard.)
Until end of turn, target artifact or creature becomes an artifact creature with base power and toughness 4/3. If evidence was collected, it has base power and toughness 1/1 until end of turn instead.
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Cards similar to Behind the Mask expected a card that isn't here?
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Extract a Confession84%
$0.23↑#10555↑0.132.7 years
"As an additional cost to cast this spell, you may collect evidence 6."
+1 more matching line
Mind Transfer Protocol84%
$0.09↓#204650.27↑0.6 years↓
"Until end of turn, target artifact or creature becomes an artifact creature with base power and toughness 4/5."
Relic's Roar84%
$0.18↑#195640.002.9 years
"Until end of turn, target artifact or creature becomes a Dinosaur artifact creature with base power and toughness 4/3 in addition to its other types."
I Am Iron Man83%
$0.15↑#165530.28↑0.3 years↓
"Until end of turn, target artifact or creature becomes an artifact creature with base power and toughness 4/4 and gains flying."
Vitu-Ghazi Inspector82%
$0.23↑#26336↓0.002.7 years
"As an additional cost to cast this spell, you may collect evidence 6."
Analyze the Pollen80%
$0.35↑#7318↑0.002.7 years
"As an additional cost to cast this spell, you may collect evidence 8."
Majestic Metamorphosis78%
$0.06↓#216950.004.5 years↑
"Until end of turn, target artifact or creature becomes a 4/4 Angel artifact creature and gains flying."
Crimestopper Sprite76%
$0.05↓#25019↓0.002.7 years
"As an additional cost to cast this spell, you may collect evidence 6."
Suit Up76%
$0.10↓#194890.26↑4.7 years↑
"Until end of turn, target creature or Vehicle becomes an artifact creature with base power and toughness 4/5."
Bite Down on Crime76%
$0.06↓#25892↓0.002.7 years
"As an additional cost to cast this spell, you may collect evidence 6. This spell costs 
less to cast if evidence was collected."
less to cast if evidence was collected."+1 more matching line
Conspiracy Unraveler75%
$0.29↑#13586↑0.71↑2.7 years
"You may collect evidence 10 rather than pay the mana cost for spells you cast."
Iron Man, Futurist Paragon73%
$1.05↑#170540.54↑0.3 years↓
"At the beginning of combat on your turn, target artifact or creature becomes an artifact creature with base power and toughness 5/5 and gains flying."
Deadly Cover-Up72%
$0.52↑#10725↑0.35↑2.7 years
"As an additional cost to cast this spell, you may collect evidence 6."
Karn's Touch72%
$0.42↑#27127↓0.0027.0 years↑
"Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn."
Diminish70%
$0.04↓#200430.17↑16.3 years↑
"Target creature has base power and toughness 1/1 until end of turn."
Yotia Declares War70%
$0.11#214740.124.1 years↑
"Up to one target artifact you control becomes an artifact creature with base power and toughness 4/4 until end of turn."
Urgent Necropsy70%
$0.27↑#187590.102.7 years
"As an additional cost to cast this spell, collect evidence X, where X is the total mana value of the permanents this spell targets."
Mercurial Transformation70%
$0.27↑#175700.065.5 years↑
"Until end of turn, target nonland permanent loses all abilities and becomes your choice of a blue Frog creature with base power and toughness 1/1 or a blue Octopus creature with base power and toughness 4/4."
Ovinize70%
$0.07↓#175390.39↑19.7 years↑
"Until end of turn, target creature loses all abilities and has base power and toughness 0/1."
Humble70%
$0.14↑#221630.1428.0 years↑
"Until end of turn, target creature loses all abilities and has base power and toughness 0/1."