Visions of Dominance {2}{G}
Sorcery
Put a +1/+1 counter on target creature, then double the number of +1/+1 counters on it.
Flashback {8}{G}{G}. This spell costs {X} less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)
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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.
Study the Classics 98%
$0.34#16605
"Put a +1/+1 counter on target creature, then double the number of +1/+1 counters on it. You gain life equal to the number of +1/+1 counters on that creature."
Invigorating Surge 89%
$0.25#3468
"Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on that creature."
Growth Curve 89%
$0.26#11853
"Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on that creature."
Fangs of Kalonia 83%
$0.29#2429
"Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on each creature that had a +1/+1 counter put on it this way."