Undercity Upheaval {1}{G}{G}
Sorcery
Undergrowth — Distribute X +1/+1 counters among any number of target creatures you control, where X is the number of creature cards in your graveyard as you cast this spell. Creatures you control gain vigilance until end of turn.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Elusive Otter // Grove's Bounty 95%
$0.29#7001
"Distribute X +1/+1 counters among any number of target creatures you control."
Vorinclex // The Grand Evolution 85%
$6.03#3161
"Distribute seven +1/+1 counters among any number of target creatures you control."
Blessing of Frost 81%
$0.33#11367
"Distribute X +1/+1 counters among any number of creatures you control, where X is the amount of {S} spent to cast this spell. Then draw a card for each creature you control with power 4 or greater."