The blend needs 2 equipments of the same rarity + tokens to blend into an equipment of a superior rarity!
You can choose whatever equipment as long is the same rarity, for example:
1 Simple Asic + 1 Eolic Turbine + tokens = Big Asic
The tokens needed to blend from Common to Rare: 1150 CFB | 1150 CFE | 2300 CFP
The tokens needed to blend from Rare to Epic: 3450 CFB | 3450 CFE | 6900 CFP
In order to blend, you need to have the equipments deposited on our game before doing it