Weathered Murals

{u}{u}{u}: Create a copy of this artifact. Any player
may activate this ability
{u}{u}Level up!
Levels 1-2: Merfolk creatures you control have Hexproof
Levels 3-4: Merfolk creatures you control have +1/+1 and Hexproof
Levels 5-6: Merfolk creatures you control have +1/+1, Hexproof, and Islandwalk
Levels 7+: Flip Weathered Murals