Awakening of Oshoko

I - Return all creatures with mana value 3 or less
to their owner's hand.
II - Islands gain "{t}: Add {u}{u}" until the
beginning of your next upkeep.
III - Create Oshoko, Maw of the Ocean, a
legendary 5/5 blue Merfolk Horror creature
token with "Whenever this creature attacks,
creatures the defending player controls get
-2/-0 until end of turn."