River Jaguar

Cast River Jaguar only if you control an island.
Lands you control have "{t}: Add {u} to your
mana pool."
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
"It is normal to think that crocodiles, caimans, or alligators rule the rivers, until you see a jaguar
hunt one." -Javara, Woodland Sorceress