Kovadah, the StormVein

Other blue creatures you control get +2/+2.
Whenever a creature leaves the battlefield, you
may search your library for a basic island card,
reveal it, and put it into your hand. Then shuffle
your library.
When Kovadah, the StormVein dies, return up
to X nonland permanents to their owners' hands
where X is the total number of islands you
control.