The Challenger's New Name is Grandmaster Prime

After having something personal stolen from him centuries ago, the Challenger makes a shocking declaration in Avengers #688.

My mission was done! I'm now a GRANDMASTER! Next Mission

Challenger (Elder of the Universe) (Earth-616)

Grandmaster and Iron ranks have been added in patch 8.24 - The

Who would win in a fight, the Hulk or Grandmaster Prime? - Quora

Who would win in a fight, the Hulk or Grandmaster Prime? - Quora

Challenger (Elder of the Universe)

MCOC Wishlist Blog — !! THE FOLLOWING CONTAINS EXTENSIVE SPOILERS

Challenger (Elder of the Universe) (Earth-616)

A Complete Guide to Marvel's Galactic Empires