Atrama, Awoken Hydromancer

Islandwalk, hexproof
When Atrama, Awoken Hydromancer enters the battlefield, create X 2/1 blue elemental creature
tokens with islandwalk where X is equal to the
number of lands you control, plus your devotion
to blue.
{2}: Put a flood counter on target land controls.
That land is an island in addition to its
other types.