Seven Dwarves 

Creature — Dwarf
This creature gets +1/+1 for each other creature named Seven Dwarves you control.
A deck can have up to seven cards named Seven Dwarves.
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Cards that do something similar expected a card that isn't here?
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Timberpack Wolf 99%
$0.16#29228
"This creature gets +1/+1 for each other creature you control named this card."
Relentless Rats 88%
$5.00#10896
"A deck can have any number of cards named this card."
+1 more matching line
Rat Colony 88%
$6.00#4459
"A deck can have any number of cards named this card."
+1 more matching line
High Sentinels of Arashin 87%
$0.21#14978
"This creature gets +1/+1 for each other creature you control with a +1/+1 counter on it."
Bellowing Aegisaur 84%
$0.30#7788
"Whenever this creature is dealt damage, put a +1/+1 counter on each other creature you control."
Mirror Box 81%
$5.37#1687
"Each nontoken creature you control gets +1/+1 for each other creature you control with the same name as that creature."
Generous Pup 81%
$5.32#5798
"Whenever one or more +1/+1 counters are put on this creature, put a +1/+1 counter on each other creature you control. This ability triggers only once each turn."