>>149757577
Ultima's beam in the beginning is just him "recycling" photons throughout a certain time span. Stacking more timelines on top mean more photons getting "recycled", which increases the output. I'm pretty sure that the "takes a bit to melt buildings" beam was also used by 50 Meter Ultima, rather than the 100 meter Ultima from the end of the show.
>>149757607
Unfortunately for you, anon, I notice a lot of typos/syntax errors.
Unfortunately for me, I make quite a lot myself since I type too quickly.