This is Aboshan, the mighty emperor of the Cephalids and other assorted aquatic characters. I tried to build this deck to be cheap, but if you've got the cash to throw around, things like Cryptic Command or Tamiyo, the Moon Sage would make excellent additions to this deck's theme of bounce and tapping. Some fun combos in this deck include:

Unnatural Selection/Lorthos, the Tidemaker + Dismiss into Dream/Willbreaker: 8 mana to destroy/take control of 8 creatures? Sign me up!

Caged Sun + Clever Impersonator + Phyrexian Metamorph + Riptide Replicator: Titanic creatures of any creature type and color every turn!

Aboshan, Cephalid Emperor/Deluge + Archetype of Imagination + Borrowing 100,000 Arrows/Theft of Dreams: Card draw for days!

Deadeye Navigator + Great Whale/Frost Titan/Draining Whelk: Great Whale provides infinite mana, Frost Titan provides great tapdown, and Draining Whelk becomes a reusable counterspell. Think of the value!