Doki Doki (MP17-EN144)

You can discard 1 Rock monster; Special Summon from your Deck, 1 Rock monster that has the same original Attribute and Level as that monster, in face-up Attack Position or face-down Defense Position. You can only use this effect of "Doki Doki" once per turn.

Rock / Effect, 2017 Mega-Tin Mega Pack