Cheapest priced copy (Ravnica Remastered): $0.79 at Card Kingdom, near mint, their price list as of .
Phytohydra 
Creature — Plant Hydra · 1/1 · Rare · Ravnica: City of Guilds · #218
If damage would be dealt to this creature, put that many +1/+1 counters on it instead.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.79 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: City of Guilds | 218 | Rare | $1.29 | $2.99 |
| Ravnica Remastered | 210 | Rare | $0.79 | $0.79 |
3 rulings from Wizards of the Coast
- 1 October 2005If another effect would prevent damage from being dealt to Phytohydra or replace it with something else, Phytohydra's controller chooses which effect to apply first.
- 1 October 2005If Phytohydra blocks or is blocked by a creature with first strike or double strike, Phytohydra will get the counters during the first-strike combat damage step before it deals its own combat damage during the second combat damage step.
- 12 January 2024Phytohydra's ability doesn't prevent damage. Damage that can't be prevented will still be replaced by +1/+1 counters being put on Phytohydra.