A special cactus castle. The card's info says: BERD-EN036: Cactus Shield (Continuous Trap) Special Summon this card as an Effect Monster (Plant/EARTH/Level 8/ATK 0/DEF 3000), then target 1 "Cactus Cathy" you control; equip that target to this card. Cannot be destroyed by battle while equipped with "Cactus Cathy". (Common)