Seaweaver Witch

{u}, {t}: Tap target creature with power less than
the number of Islands you control, it does not
untap during it's owners untap step for as long
as you control Seaweaver Witch.
{u}, {t}: Put target creature with toughness less
than the number of Islands you control on top
of its owner's library, then that creature's
controller may Scry 3.