Blue Deathster, Stabil Helfen: DZ Booster Set 04: Destined Showdown

[AUTO](RC):When this unit boosts a unit with Blue Deathster in its card name, you may have this unit get [CONT](RC):During the battle this unit boosted, when your opponent would call cards from hand to (GC), they must call two or more cards at the same time. until end of that battle. If you do, at the end of that battle, retire this unit.