Chimeratech Overdragon [DT07-EN032] Rare Commander 2019 except when destroyed by battle:

except when destroyed by battle: Special Summon 1 "Oyster Token" (Fish-Type/WATER/Level 1/ATK 0/DEF 0)

Set: Platinum: Rising Rivals Type: Darkness Rarity: Common Retreat cost: Colorless

Set: Black & White: Noble Victories Type: Psychic Rarity: Uncommon Retreat cost: Colorless

We're not sure how they got here

FIRE monsters you control cannot be destroyed by battle

Chimeratech Overdragon [DT07-EN032] Rare Commander 2019 except when destroyed by battle:Set: Duel Terminal 7 Card type: Fusion Effect Monster Rarity: Rare Attack: ? Defense: ? Cyber Dragon + 1 or more Machine Type monsters Must be Fusion Summoned and cannot be Special Summoned by other ways. When this card is Fusion Summoned: Send all other cards you control to the Graveyard. The original ATK and DEF of this card each become 800 x the number of Fusion Material Monsters used for its Fusion Summon. Each turn, this card can attack your