Mirrorpool from the Magic: The Gathering set, Edge of Eternities. 
Mythic Rare #0162 - Borderless Galaxy Rainbow Foil
Edge of Eternities: Stellar Sights (EOS)
Condition: Near Mint
 
Near Mint Definition: Cards show minimal wear from light play or handling. Surfaces are clean, corners sharp, and edges mostly unblemished, with only minor flaws like slight edge wear or small scratches. No major defects. Range includes cards from flawless to lightly imperfect.