Gem-Knight Iolite (HA06-EN032) - Hidden Arsenal 6: Omega Xyz Unlimited

This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it become an Effect Monster with this effect.
Once per turn: You can banish 1 "Gem-" monster from your Graveyard to target 1 "Gem-Knight" card in your Graveyard; add that target to your hand.