Misty's Gyarados

This Gyarados' power and toughness are each
equal to the number of Islands you control.

Whenever this Gyarados enters or attacks, put a flood counter on target land. It's an Island in addition to its other types for as long as it has a flood counter on it.
The first quick attack or normal attack you make (instant or sorcery spell you cast) each
turn costs {u} (or {1}) less to cast for each land
you control with a flood counter on it