sinarsa reef captain

Secluded (during your end step you may choose
to exile this card face down under an island, if its
the only creature under that island than its
"secluded." at your upkeep step you may choose
to put this card back into play, it gains haste).
first strike
islandwalk
any island card with a creature secluded under it
gains "{t}: add {u}{u} to your mana pool.