Chimeratech Overdragon [POTD-EN034] Ultimate Rare Secret Lair Drop Promos if Tombstone Stairwell is on

if Tombstone Stairwell is on the battlefield

or planeswalker an opponent controls

Set: Beta Edition Type: Creature — Rat Rarity: Common Cost: {2}{B} Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield

When Aura Thief dies

Chimeratech Overdragon [POTD-EN034] Ultimate Rare Secret Lair Drop Promos if Tombstone Stairwell is onSet: Power of the Duelist Card type: Fusion Effect Monster Rarity: Ultimate Rare Attack: ? Defense: ? "Cyber Dragon" + 1 or more Machine Type monsters This monster cannot be Special Summoned except by Fusion Summon. When this card is Fusion Summoned, send all the cards on your side of the field to the Graveyard except this card. The original ATK and DEF of this card become the number of Fusion Material Monsters you used for the Fusion Summon of this