Rock Hydra 
Creature — Hydra
$1.00 #27908 0.62 33.2 years
This creature enters with X +1/+1 counters on it.
For each 1 damage that would be dealt to this creature, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage.
: Prevent the next 1 damage that would be dealt to this creature this turn.: Put a +1/+1 counter on this creature. Activate only during your upkeep.Click a line or tag to filter
Cards similar to Rock Hydra 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.
Ugin's Conjurant96%
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"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."
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Phantom Nantuko96%
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Phantom Tiger96%
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"If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature."
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"If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature."
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Phantom Wurm96%
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"If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature."
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Undergrowth Champion95%
$0.38↓#8504↑0.00↓11.0 years↓
"If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from this creature."
Protean Hydra95%
$4.24↑#6637↑0.5217.3 years↓
"If damage would be dealt to this creature, prevent that damage and remove that many +1/+1 counters from it."
+1 more matching line
Oathsworn Knight94%
$0.19↓#19708↑0.20↓7.0 years↓
"If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from it."
+1 more matching line
Phantom Centaur94%
$0.15↓#272840.17↓24.4 years↓
"If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature."
+1 more matching line
Unbreathing Horde91%
$0.27↓#8318↑0.19↓15.1 years↓
"If this creature would be dealt damage, prevent that damage and remove a +1/+1 counter from it."
Balduvian Hydra90%
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": Put a +1/+0 counter on this creature. Activate only during your upkeep."
: Put a +1/+0 counter on this creature. Activate only during your upkeep."+2 more matching lines
Phantom Nishoba90%
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"If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature."
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Bloatfly Swarm89%
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"If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage, remove that many +1/+1 counters from it, then give each player a rad counter for each +1/+1 counter removed this way."
+1 more matching line
Revered Elder88%
$0.10↓#320910.00↓27.0 years↓
"
: Prevent the next 1 damage that would be dealt to this creature this turn."
: Prevent the next 1 damage that would be dealt to this creature this turn."
Polukranos, Unchained88%
$0.74↓#12145↑0.12↓6.7 years↓
"If damage would be dealt to this card while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from it."
+1 more matching line
Jungle Delver86%
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"
: Put a +1/+1 counter on this creature."
: Put a +1/+1 counter on this creature."
Ruins Recluse86%
$3.34↑#11248↑0.00↓3.5 years↓
": Put a +1/+1 counter on this creature."
: Put a +1/+1 counter on this creature."
Verdant Automaton86%
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": Put a +1/+1 counter on this creature."
: Put a +1/+1 counter on this creature."
Carnivorous Moss-Beast86%
$0.06↓#296180.00↓12.3 years↓
"
: Put a +1/+1 counter on this creature."
: Put a +1/+1 counter on this creature."