Island Fish Jasconius is a rare Creature — Fish card from Revised Edition (3ED), collector number 61. Current market price: $0.70, TCGplayer market prices via Scryfall.
This creature doesn't untap during your untap step. At the beginning of your upkeep, you may pay {U}{U}{U}. If you do, untap this creature. This creature can't attack unless defending player controls an Island. When you control no Islands, sacrifice this creature.