How Eldrazi mana symbol could have looked like?

Have you ever wondered how Eldrazi mana symbol could looked like? Probably not. But, what other possibilites were taken into consideration? Aaron Forsythe, who is director of R&D department, revealed us the unprinted Augmentor of Kozilek, which became Endbringer that we know from Battle for Zendikar. At least art stayed the same, rest was redesigned.

Fortunately, Wizards abandoned this idea. It was a bit misleading. Some people, especially beginners may have thought that Augmentor of Kozilek cost fifty one mana. Current mana symbol looks much better.