Here’s a Rock to strengthen your Spirits in Circuit Break!
Level 4 EARTH Rock-Type Spirit Effect Monster
This card cannot be Special Summoned.
(1) Monsters cannot activate effects, except Spirit Monsters.
(2) Once per turn, during the End Phase, if this card was Normal Summoned or flipped face-up this turn: Return it to the hand.
This card is based on the cave Ama-no-Iwato, the cave where Amaterasu hid after her brother Susanowo terrified her. She was later drawn out due to dancing and music by a gathering of gods in order to return light to the world. (Since she is the sun.)