Phytohydra {2}{G}{W}{W}
Creature — Plant Hydra
If damage would be dealt to this creature, put that many +1/+1 counters on it instead.
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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.
Hungering Hydra 87%
$2.96#3497
"Whenever this creature is dealt damage, put that many +1/+1 counters on it."
Selfless Squire 86%
$0.39#2492
"Whenever damage that would be dealt to you is prevented, put that many +1/+1 counters on this creature."
Blood Hound 85%
$0.53#24037
"Whenever you're dealt damage, you may put that many +1/+1 counters on this creature."
Protean Hydra 85%
$4.47#6344
"If damage would be dealt to this creature, prevent that damage and remove that many +1/+1 counters from it."
Benevolent Hydra 83%
$0.99#3026
"If one or more +1/+1 counters would be put on another creature you control, that many plus one +1/+1 counters are put on it instead."
Conclave Mentor 82%
$0.67#2296
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on that creature instead."
High Score 82%
$1.15#5785
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead."
Hardened Scales 82%
$1.79#186
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead."
Michelangelo, Weirdness to 11 82%
$3.26#5838
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead."
Enduring Scalelord 82%
$0.30#10894
"Whenever one or more +1/+1 counters are put on another creature you control, you may put a +1/+1 counter on this creature."
Ugin's Conjurant 81%
$0.14#11378
"If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from this creature."