This is a milling combo deck that can win as early as turn 6 by either milling or by swinging with a clutch of gigantic creatures.

The combo:Fathom Mage + Horizon Chimera + Archangel of Thune (or Sunbond)

You can start from any of steps 1-3.

1: Draw a card

2: gain a life

3: put counters on Fathom Mage

4: repeat until you've drawn your deck, then swing with massive creatures. Or dump the cards to Prognostic Sphinx and mill your opponent with Psychic Spiral. Or start the combo over by hitting your Elixir of Immortality.