Eustreptospondylus

Flash, Delve (You may exile any number of cards from your graveyard as you cast this spell. It costs {1} less to cast for each card exiled this way.)
Instant spells you cast cost {1} less to cast.
Eustreptospondylus has been considered a good swimmer, strong enough to swim from island to island like the modern day Komodo dragon. Not all palaeontologists agree with the swimming hypothesis.