Evigishki Merrowgeist

Rank 4 WATER/Aqua XYZ Monster
2100 ATK / 1600 DEF

2 Level 4 monsters
After damage calculation, if this card destroys an opponent's monster by battle: You can detach 1 Xyz Material from this card; shuffle the destroyed monster into the Deck instead of sending it to the Graveyard.

Rulings – Yugipedia

Printings:

Duel Terminal 6b: DT06-EN089 (Duel Terminal Ultra Parallel Rare) - 2012-05-25
Hidden Arsenal 6: Omega Xyz: HA06-EN053 (Secret Rare) - 2012-07-24
Battle Pack 3: Monster League: BP03-EN121 (Shatterfoil Rare) - 2014-07-31

Prices:

Cardmarket: 0.80 €
TCGplayer: $ 0.91