Island Fish Jasconius [Revised Edition]

Set: Revised Edition Type: Creature — Fish Rare Cost: {4}{U}{U}{U} Island Fish Jasconius doesn't untap during your untap step. At the beginning of your upkeep, you may pay {U}{U}{U}. If you do, untap Island Fish Jasconius. Island Fish Jasconius can't attack unless defending player controls an Island. When you control no Islands, sacrifice Island Fish Jasconius.