Neptune, Lord of the Sea

Islandwalk, Ward {2}
Whenever you cast a Merfolk creature spell put
a +1/+1 counter on Neptune, Lord of the Sea.
Merfolk, Krackens, Leviathans, Sea Kings, and
Serpents you cast cost {1} less to cast for each
+1/+1 counter on Neptune.
Tap seven untapped Merfolk you control: Untap
all noncreature permanents you control.