Kissia, Trench Overseer

Kissia, Trench Overseer has indestructible as
long as you control seven or more Islands.
Blue creatures you control have flash.
Whenever a nontoken creature enters the
battlefield under your control, if it isn't your
turn, draw a card and put a +1/+1 counter on
it. If you spent six or more mana to cast that
creature spell, also create a 6/6 blue Serpent
creature token.