Tephraderm is a rare Creature — Beast card from Onslaught (ONS), collector number 239. Current market price: $0.25 (foil $5.00), TCGplayer market prices via Scryfall.
Whenever a creature deals damage to this creature, this creature deals that much damage to that creature. Whenever a spell deals damage to this creature, this creature deals that much damage to that spell's controller.