Scarred Puma 
Creature — Cat
This creature can't attack unless a black or green creature also attacks.
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Cards that do something similar expected a card that isn't here?
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Goblin Cohort 91%
$0.24#24308
"This creature can't attack unless you've cast a creature spell this turn."
Mogg Conscripts 91%
#27105
"This creature can't attack unless you've cast a creature spell this turn."
Bloodcrazed Goblin 91%
$0.18#25197
"This creature can't attack unless an opponent has been dealt damage this turn."
Orcish Conscripts 90%
#30294
"This creature can't attack unless at least two other creatures attack."
Silburlind Snapper 88%
$0.04#26997
"This creature can't attack unless you've cast a noncreature spell this turn."
Harbor Serpent 87%
$0.14#20206
"This creature can't attack unless there are five or more Islands on the battlefield."
Mogg Toady 87%
$0.11#30572
"This creature can't attack unless you control more creatures than defending player."
Goblin Goon 87%
$0.35#20282
"This creature can't attack unless you control more creatures than defending player."
Lovestruck Beast // Heart's Desire 86%
$0.23#12443
"This creature can't attack unless you control a 1/1 creature."
Warden of the Chained 86%
$0.10#27889
"This creature can't attack unless you control another creature with power 4 or greater."
Lambholt Pacifist // Lambholt Butcher 86%
$0.21#23485
"This creature can't attack unless you control a creature with power 4 or greater."
Ogre Jailbreaker 86%
$0.03#27254
"This creature can attack as though it didn't have defender as long as you control a Gate."