The Goose Mother 


Legendary Creature — Bird Hydra
Flying
The Goose Mother enters with X +1/+1 counters on it.
When The Goose Mother enters, create half X Food tokens, rounded up.
Whenever The Goose Mother attacks, you may sacrifice a Food. If you do, draw a card.
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Cards that do something similar expected a card that isn't here?
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Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel 85%
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"Whenever this card attacks, you may sacrifice any number of other creatures. If you do, draw that many cards."
The Meep 85%
$29.88#19203
"Whenever this card attacks, you may sacrifice another creature. If you do, creatures you control have base power and toughness X/X until end of turn, where X is the sacrificed creature's mana value."
Ashnod, Flesh Mechanist 83%
$0.32#11334
"Whenever this card attacks, you may sacrifice another creature. If you do, create a tapped Powerstone token."
Provisions Merchant 82%
$0.30#12379
"Whenever this creature attacks, you may sacrifice a Food. If you do, attacking creatures get +1/+1 and gain trample until end of turn."
+1 more matching line
Vrestin, Menoptra Leader 100%
$0.28#13296
"this card enters with X +1/+1 counters on it."
+1 more matching line
The Ruinous Wrecking Crew 100%
$0.21#23097
"this card enters with X +1/+1 counters on it."
+1 more matching line
Prime Speaker Zegana 85%
$0.18#2754
"this card enters with X +1/+1 counters on it, where X is the greatest power among other creatures you control."
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Polukranos, Unchained 81%
$0.78#11497
"this card enters with six +1/+1 counters on it. It escapes with twelve +1/+1 counters on it instead."