Years ago, when this rule was likely established, not everyone played with opaque sleeves
Treasure Map Englisch | Limited Edition Cardnumber: DPK-ENSE2 Englisch: Treasure Map Deck: Duelist Pack Jaden Yuki Rarity: Secret Rare Cardtype: Fallenkarte Property: GBA: 54762426 Gameplay: Unlimitiert (3) Release Date: 09.03.2006 You can only activate this card in response to the activation of an effect that would return this card from the field to the hand
Below are some hands that Ive generated for pre-board games where I dont know what my opponent is playing: Hand 1 - Underground Sea, Badlands, Swamp, Lotus Petal, Animate Dead, Exhume, Unmask I would mulligan this hand on the play and the draw as you are missing an enabler and dont have a path to find it
C Common Small World X SPELL Reveal 1 monster in your hand, choose 1 monster from your Deck that has exactly 1 of the same Type, Attribute, Level, ATK or DEF, and banish the revealed monster from your hand face-down
However, as he was dealing with animation, lighting and other effects would bring out the differences, so he designed this "Blue-Eyes" with a style not used before
If your opponent has no Monsters in attack mode, you may flip this card face-down
