Rock Hydra
~$1.00 low · ~$76.99 high
Red. Creature — HydraReserved List
Summer Magic / Edgar #173 · Illustrated by Jeff A. Menges
Summer Magic / Edgar #173 · Illustrated by Jeff A. MengesWhat is Rock Hydra worth?
Highest TCGplayer price
~$76.99
Retro Frame non-foil · 30th Anniversary Edition #464
See it on TCGplayer4 printings have no TCGplayer price.
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TCGplayer market prices in USD, updated October 14, 2026. Each price is for one printing and one finish.
Oracle text
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.
0/0
Format legality
All 10 printings of Rock Hydra
| Printing | Rarity | Non-foil | Cardmarket (EUR) |
|---|---|---|---|
 30th Anniversary Edition 30a #167· 2022Not tournament legalrare· Cardmarket €33.11 | rare | $14.98 | €33.11 |
 30th Anniversary Edition 30a #464· 2022Not tournament legalRetro Framerare· Cardmarket €80.00 | rare | $76.99 | €80.00 |
 Summer Magic / Edgar sum #173· 1994rare· Cardmarket €1,200.00 | rare | $1.00 | €1,200.00 |
 Revised Edition 3ed #173· 1994rare· Cardmarket €2.43 | rare | $3.89 | €2.43 |
 Foreign Black Border fbb #173· 1994Frenchrare· Cardmarket €4.46 | rare | — | €4.46 |
 Collectors' Edition ced #172· 1993Not tournament legalrare· Cardmarket €4.22 | rare | $8.00 | €4.22 |
 Intl. Collectors' Edition cei #172· 1993Not tournament legalrare· Cardmarket €3.78 | rare | — | €3.78 |
 Unlimited Edition 2ed #172· 1993rare· Cardmarket €23.24 | rare | $45.99 | €23.24 |
 Limited Edition Beta leb #172· 1993rare· Cardmarket €198.95 | rare | — | €198.95 |
 Limited Edition Alpha lea #171· 1993rare· Cardmarket €905.96 | rare | — | €905.96 |
Prices are TCGplayer market prices in USD for each printing and finish, via Scryfall. They are a guide, not an appraisal.
Where to buy Rock Hydra
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Card details
- First printed
- 1993
- Printings
- 10
- Mana value
- 2
- EDHREC rank
- #27,882 on EDHREC (Commander popularity)
- Artist
- Jeff A. Menges
Rulings (4)
2004-10-04
If put onto the battlefield without casting it from your hand, X will be zero.
2004-10-04
Once on the battlefield, the X is considered to be zero when calculating its mana cost.
2008-08-01
If damage that would be dealt to Rock Hydra can't be prevented, you still remove a +1/+1 counter from it for each 1 damage dealt.
2008-08-01
You can activate the activated ability that prevents damage any time, even if no source seems likely to deal damage to you in the near future. It will prevent the next 1 damage that would be dealt this turn, even if that turns out to be much later in the turn.
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