It seems another "Rootborn Defenses" incident occurred at an FNM at a local gaming store. Inside a booster pack was opened this card:

Simic Fluxmage {2U}

Creature - Merfolk Wizard

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

1U, Tap: Move a +1/+1 counter from Simic Fluxmage onto target creature.

Pow/Tou: 1/2

Artist: Karl Kopinski

Card number: 49/249

While it has not been proven to be 100% legitimate, there are multiple threads on Reddit as well as one on MTGSalvation with at least two different pictures at different angles of this card.