Effect effect = new LoseCreatureTypeSourceEffect(new DevotionCount(ColoredManaSymbol.U), 5);
effect.setText("As long as your devotion to blue is less than five, Thassa isn't a creature.<i>(Each {U} in the mana costs of permanents you control counts towards your devotion to blue.)</i>");
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, effect));
// At the beginning of your upkeep, scry 1.
this.addAbility(new BeginningOfUpkeepTriggeredAbility(Zone.BATTLEFIELD, new ScryEffect(1), TargetController.YOU, false));
// 1{U}: Target creature you control can't be blocked this turn.
Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new CantBeBlockedTargetEffect(Duration.EndOfTurn), new ManaCostsImpl("{1}{U}"));
ability.addTarget(new TargetControlledCreaturePermanent());
this.addAbility(ability);