Supergate Invasion

When Supergate Invasion enters the battlefield: Each opponent creates a 5/5 colorless Ori Ship artifact creature token with flying. For each Ori Ship created this way, that opponent loses 3 life. At the beginning of each upkeep, if an opponent controls an Ori Ship, they may: Sacrifice a Clue. If they don’t, Ori Ships they control attack this turn if able. When no Ori Ships remain on the battlefield, exile Supergate Invasion.