Nomad of the Shallows

When Nomad of the Shallows enters the battlefield, create a 4/4 blue Leviathan creature token.
{u}{u}: Target Abyssal creature you control gains trample until end of turn. (Krakens, Leviathans, Octopuses and Serpents are Abyssal.)
Some Rheavela merfolk split away from their rooted society, rather choosing to roam with leviathan pods and befriend the giant creatures.