Cat Collector 

Creature — Human Citizen
When this creature enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")
Whenever you gain life for the first time during each of your turns, create a 1/1 white Cat creature token.
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Cards that do something similar expected a card that isn't here?
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Attended Healer 99%
$0.24#12876
"Whenever you gain life for the first time each turn, create a 1/1 white Cat creature token."
Eastfarthing Farmer 91%
$0.12#12799
"When this creature enters, create a Food token. When you do, target creature you control gets +1/+1 until end of turn for each Food you control."