Mother Hydra, Familiar of Cthulhu (MP01-131 SR) [Masterpiece "Pilgrim-Memories"]

[Incarnation] U or B, U or B [Enter] If you don't control a resonator named "Father Dagon, Familiar of Cthulhu", you may search your deck for a card named "Father Dagon, Familiar of Cthulhu" and put it into the field rested. If you do, shuffle your deck. This ability triggers only if you control a Cthulhu J/ruler, a Demonic J/ruler or a Fiend J/ruler. Whenever a resonator named "Father Dagon, Familiar of Cthulhu" enters the field under your control >>> You may put this card from your hand or graveyard into the field.