The set can be upgraded using Crystals from the abyssal sire. Combining a piece with 250 crystals creates the T1 varient (1.5x base stats), another 500 crystals on top of that creates the T2 varient (2x base stats), and an additional 750 (4500 total crystals) creates the T3 varient, with 2.5x the piece's base stats. The upgraded sets have the same drop rate and double drop rate bonuses as the original set.
The set can be obtained by farming out it's pieces as a drop or by donating $500 on the Dreamscape Store.
The Pieces of this set are dropped by the following bosses:
Currently, The price of Dream Range Set is roughly: 200-300M DScoins