When this creature enters, sacrifice a creature.
: Regenerate this creature.
Its spines are prized as writing quills by the priests of Gix.
Illustrated by Mark A. Nelson · Urza's Saga · #160
There are no rulings for Spined Fluke.
Sacrifice a Goblin: Regenerate this creature.
Flying
, Sacrifice a creature: Regenerate this creature.
When this creature enters, sacrifice a land.
When this creature enters, sacrifice it unless you discard a creature card.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Sacrifice a creature: Regenerate this creature.
Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)
When you cast a creature spell, sacrifice this creature.