Synchronized Charge 

Sorcery
Distribute two +1/+1 counters among one or two target creatures you control. Creatures you control with counters on them gain vigilance and trample until end of turn.
Harmonize {4}{G} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by {X}, where X is its power. Then exile this spell.)
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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.
Revival of the Ancestors 91%
$0.25#11676
"Distribute three +1/+1 counters among one, two, or three target creatures you control."
Defend the Celestus 91%
$0.20#19929
"Distribute three +1/+1 counters among one, two, or three target creatures you control."
Ondu Knotmaster // Throw a Line 80%
$0.17#19402
"Distribute two +1/+1 counters among one or two target creatures."