Forgotten Temple of the Deep (SDRE-EN034) - Structure Deck: Realm of the Sea Emperor 1st Edition

While this card is on the field, this card's name is treated as "Umi". Once per turn, you can select and remove from play 1 face-up Level 4 or lower Fish-Type, Sea Serpent-Type or Aqua-Type monster you control. (This effect can be activated during either player's turn.) Special Summon it during your End Phase.