Mimicked Plesiosaur

Trample, devour (When this creature destroys a
permanent, it gets +1/+1 counters equal to its
converted mana cost. If it is 0, draw a card. If it
was a creature, choose a keyword it has, this
creature gets that keyword counter.)
At the beginning of your end step if Mimicked Plesiosaur gained a +1/+1 this turn, search your library for an island and put it onto the battlefield, then shuffle your library.
{1}{u}{b}{g}: Adapt 3.