So the idea is to use Descendants' Path to play eldrazi from the top of the deck. Smaller eldrazi can be created using Nest Invader and Blisterpod. These have the creature type 'Eldrazi', allowing Descendants' Path to play bigger ones such as Pathrazer of Ulamog for free.

This is all well and good, but relying on tone card alone is not very reliable. This is why I am also running Quicksilver Amulet as a way of getting the eldrazi that build up in the hand onto the battlefield. Summoning Trap is a sideboard card which can also be used to cheat out eldrazi if against blue.

Reason / Believe is a nice new addition allowing for consistency in draws and acting as another means of cheating out cards.

The full non-budget version can be found here: http://tappedout.net/mtg-decks/eldrazi-descendants-the-second-generation/