Odd I
The Dreams were unique.
The Dreams were long.
The proficiency of the Amarantos Dream of the Megalos was low as Noah knew it wouldn't allow him to spend too many years within a Dream.
Going by the Dreams of Ozymandias, a range of 2,000 to 3,000 years was the maximum currently, and he had to ensure that he didn't expose himself to any Great Ones or entities of similar power as they would know he was a Dreamer.
An oddity that, similar to the last Dream of Ozymandias, he would be killed and the Dream would come to an end!
So even though he appeared at a time when the Great Beyonder was active, he only collected information about this entity while preparing to obtain the biggest possible gain from this Dream.
The Transcendent Megalos Ability, the Sword of the Megalos!
He didn't have his Infinite Mana, his Infinite Omniverse, or his Atlas of Existence, but he could still bring a semblance of what made him outstanding into these dreams.