Neighborhood Guardian 

Creature — Unicorn
$0.12 #17952 0.07 2.7 years
Whenever another creature you control with power 2 or less enters, target creature you control gets +1/+1 until end of turn.
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Cards similar to Neighborhood Guardian expected a card that isn't here?
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Vicious Clown96%
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"Whenever another creature you control with power 2 or less enters, this creature gets +2/+0 until end of turn."
Serra Redeemer90%
$0.29↑#9063↑0.004.1 years↑
"Whenever another creature you control with power 2 or less enters, put two +1/+1 counters on that creature."
Ezuri, Claw of Progress89%
$2.01↑#5693↑0.43↑10.9 years↑
"Whenever a creature you control with power 2 or less enters, you get an experience counter."
Welcoming Vampire86%
$2.26↑#428↑0.17↑4.9 years↑
"Whenever one or more other creatures you control with power 2 or less enter, draw a card. This ability triggers only once each turn."
Marketwatch Phantom86%
$0.05↓#26338↓0.002.7 years
"Whenever another creature you control with power 2 or less enters, this creature gains flying until end of turn."
Irreverent Gremlin82%
$0.28↑#8387↑0.122.1 years
"Whenever another creature you control with power 2 or less enters, you may discard a card. If you do, draw a card. Do this only once each turn."
Mentor of the Meek82%
$0.15↑#669↑0.1415.1 years↑
"Whenever another creature you control with power 2 or less enters, you may pay
. If you do, draw a card."
Fallaji Vanguard81%
$0.15↑#199730.19↑3.9 years↑
"Whenever this creature or another creature you control enters, target creature gets +2/+0 until end of turn."
Boltwing Marauder80%
$0.18↑#193970.0011.6 years↑
"Whenever another creature you control enters, target creature gets +2/+0 until end of turn."
Herd Gnarr80%
$0.09↓#31509↓0.0521.2 years↑
"Whenever another creature you control enters, this creature gets +2/+2 until end of turn."
Bronzebeak Moa80%
$0.05↓#25082↓0.0513.5 years↑
"Whenever another creature you control enters, this creature gets +3/+3 until end of turn."
Mutant Town Musicians80%
$0.07↓#25291↓0.21↑0.6 years↓
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Llanowar Stalker80%
$0.15↑#22852↓0.064.1 years↑
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Beast-Kin Ranger80%
$0.19↑#153280.051.9 years
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Crossroads Watcher80%
$0.13↑#194870.150.7 years↓
"Whenever another creature you control enters, this creature gets +1/+0 until end of turn."
Attended Socialite80%
$0.13↑#23977↓0.004.5 years↑
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Loporrit Scout80%
$0.12#189740.001.4 years↓
"Whenever another creature you control enters, this creature gets +1/+1 until end of turn."
Snarling Gorehound78%
$0.25↑#5223↑0.29↑2.7 years
"Whenever another creature you control with power 2 or less enters, surveil 1."
Haazda Vigilante78%
$0.03↓#27808↓0.002.7 years
"Whenever this creature enters or attacks, put a +1/+1 counter on target creature you control with power 2 or less."