Deep Sea Serpent Rider (Full Art) (TEU-060 R) [Timeless Eclipse of the Underworld]

[Untouchable] [Terrifying] [Enter] Put target non-token, non-magic stone, non-J-ruler entity on the bottom of its owner's deck. If you played this card, recover two magic stones you control, then expel the bottom four cards of your deck. [Depths] (This card gains the following text in all zones as long as there are fifteen or less cards in your deck.) - Whenever you play a spell >>> Reveal cards from the top of your deck until you reveal a card with the same total cost as the spell being played. Put that card into your hand and shuffle the rest into your deck. This ability triggers only once per turn.