Seagraff Watercell

You may choose not to tap enchanted island
during your untap phase.
Enchanted Island gains "1{u}{t}: Target creature
cannot be untapped until this land is."
(Bestial gurgling barks) "Jailer there recons he
wouldn't want anyone to meet that thing out in the
open sea any more than you would want someone
to meet it on the street."