Altered Ego 
Creature — Shapeshifter
$0.20 #4080 0.13 10.4 years
This spell can't be countered.
You may have this creature enter as a copy of any creature on the battlefield, except it enters with X additional +1/+1 counters on it.
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Cards similar to Altered Ego expected a card that isn't here?
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Stunt Double91%
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"You may have this creature enter as a copy of any creature on the battlefield."
Clone91%
$0.31↑#37420.31↑33.1 years↑
"You may have this creature enter as a copy of any creature on the battlefield."
Mirror Image90%
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"You may have this creature enter as a copy of a creature you control."
Quicksilver Gargantuan87%
$0.54↑#18240↓0.1415.9 years↑
"You may have this creature enter as a copy of any creature on the battlefield, except it's 7/7."
Hit-Monkey87%
$2.59↑#13766↓0.00↓0.2 years↓
"This spell can't be countered."
Vexing Beetle87%
$0.24↑#31481↓0.00↓23.6 years↑
"This spell can't be countered."
Terra Stomper87%
$0.19↓#15439↓0.71↑16.9 years↑
"This spell can't be countered."
Carnage Tyrant87%
$4.38↑#6706↓0.28↑8.9 years↓
"This spell can't be countered."
Gigantic Big Bear87%
$0.42↑#13521↓0.00↓0.1 years↓
"This spell can't be countered."
Blurred Mongoose87%
$0.58↑#30278↓0.1125.9 years↑
"This spell can't be countered."
Glasspool Mimic // Glasspool Shore84%
$5.87↑#1166↑0.215.9 years↓
"You may have this creature enter as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types."
Petrified Wood-Kin84%
$0.25↑#27926↓0.00↓20.6 years↑
"This spell can't be countered."
Gigantoplasm82%
$0.49↑#9188↓0.0510.8 years
"You may have this creature enter as a copy of any creature on the battlefield, except it has ": This creature has base power and toughness X/X.""
: This creature has base power and toughness X/X.""
Undercover Operative82%
$0.37↑#5371↓0.32↑4.4 years↓
"You may have this creature enter as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature."
Malleable Impostor82%
$5.78↑#44940.163.0 years↓
"You may have this creature enter as a copy of a creature an opponent controls, except it's a Faerie Shapeshifter in addition to its other types and it has flying."
Last Word82%
$0.65↑#18697↓0.67↑22.6 years↑
"This spell can't be countered."
Vesuvan Doppelganger82%
$18.79↑#17248↓0.35↑33.1 years↑
"You may have this creature enter as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability.""
Visage Bandit81%
$0.15↓#7365↓0.41↑2.4 years↓
"You may have this creature enter as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types."
Progenitor Mimic81%
$1.11↑#5370↓0.43↑13.3 years↑
"You may have this creature enter as a copy of any creature on the battlefield, except it has "At the beginning of your upkeep, if this creature isn't a token, create a token that's a copy of this creature.""
Loxodon Smiter81%
$0.21↑#23103↓0.27↑13.9 years↑
"This spell can't be countered."