Adaptive Sporesinger 

Creature — Phyrexian Druid
$0.19 #11053 0.04 3.6 years
Vigilance
When this creature enters, choose one —
• Target creature gets +2/+2 and gains vigilance until end of turn.
• Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
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Cards similar to Adaptive Sporesinger 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.
Might of the Ancestors88%
$0.09↓#19230↓0.002.8 years
"At the beginning of combat on your turn, target creature you control gets +2/+0 and gains vigilance until end of turn."
Combat Professor88%
$0.08↓#23845↓0.27↑5.4 years↑
"At the beginning of combat on your turn, target creature you control gets +1/+0 and gains vigilance until end of turn."
Surly Farrier87%
$0.08↓#20665↓0.000.6 years↓
"
: Target creature you control gets +1/+1 and gains vigilance until end of turn. Activate only as a sorcery."
Expanded Anatomy84%
$0.24↑#128550.065.4 years↑
"Put two +1/+1 counters on target creature. It gains vigilance until end of turn."
Sandstone Bridge83%
$0.13↓#121440.15↑10.9 years↑
"When this land enters, target creature gets +1/+1 and gains vigilance until end of turn."
Engineered Might83%
$0.09↓#26561↓0.22↑9.9 years↑
"• Creatures you control get +2/+2 and gain vigilance until end of turn."
+1 more matching line
Due Diligence82%
$0.09↓#17750↓0.27↑2.6 years
"When this Aura enters, target creature you control other than enchanted creature gets +2/+2 and gains vigilance until end of turn."