During either player's turn, if your opponent Summoned 3 or more monsters this turn: You can Special Summon this card from your hand. If Summoned this way, it is unaffected by other cards' effects, but loses 500 DEF during each player's Standby Phase.
![Trifortressops [SR04-EN017] Common](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/a7d78386-c3a9-5ec4-a5ef-1750174b2149.png?v=1698555990&width=1445)