Infinite Reflection attached to any creature you control that does not have a cycling ability.
({U} magic symbol) available.
Steps
Cast Sandbar Merfolk either from your hand or from your graveyard by paying ({U} magic symbol) , causing it to enter the battlefield as a copy of the creature with Infinite Reflection attached.
If you cast Sandbar Merfolk from your graveyard, Sandbar Merfolk is not exiled by Abandoned Sarcophagus due to Infinite Reflection removing Sandbar Merfolk's cycling ability.