Infinite Authority {W}{W}{W}
Enchantment — Aura
Enchant creature
Whenever enchanted creature blocks or becomes blocked by a creature with toughness 3 or less, destroy the other creature at end of combat. At the beginning of the next end step, if that creature was destroyed this way, put a +1/+1 counter on the first creature.
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Cards that do something similar expected a card that isn't here?
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Ferocity 87%
$0.24#23790
"Whenever enchanted creature blocks or becomes blocked, you may put a +1/+1 counter on it."
+1 more matching line
Vampiric Embrace 81%
$0.32#26464
"Whenever a creature dealt damage by enchanted creature this turn dies, put a +1/+1 counter on that creature."