Gallant Granite [MP20-EN167] Prismatic Secret Rare

2 Level 4 monsters You can detach 1 material from this card, then activate 1 of these effects; • Add 1 Rock monster from your Deck to your hand. • Special Summon 1 Rock monster from your hand in face-down Defense Position. You can only use this effect of "Gallant Granite" once per turn.