If a face-up "Stardust Dragon(s)" you control and/or face-up Synchro Monster(s) you control that specifically lists that card in its text leaves the field to activate your card effect, or by your card effect: You can apply 1 of the following effects. You cannot apply that same effect of "Majestic Mirage" for the rest of this turn.
● Special Summon 1 of those monsters.
● Banish 1 monster your opponent controls or in their GY.
● Any damage you take this turn is halved.