Not confused with Ordinal Level function from "Longest Waiting Sims" legend.
Eta-Hyper 1 Cardinal (1̸, represented as 1[/] in FF2K25's notation) is a number that is totally unreachable from stacking and extending Ordinal Levels, and their functions.
Go check the original proccess page here:
https://docs.google.com/document/d/135EcicQRu0i8-s3R3noW2m0J_iiUKlWlBN0pbeZ_Zss/edit?usp=sharing
LWS' Ordinal Level Function[]
Imagine we use LWS' Ordinal Level function instead of the traditional Ordinal Level function. Overall, Longest Waiting Sims' Ordinal Level function grows so much faster. The variant of Eta-Hyper One Cardinal using with LWS' Ordinal Level would be below Ram Aeternus listed in the legend.
There is another classification called Effortfulian Class, which can categorize lots of FGW entries such as Absolute Aperdinal and The Unbreakable Border. This can be compared to classes in The List Of Numbers. The variant of Eta-Hyper One Cardinal using with Effortfulian Class would be beyond undefinable, but the collapsed form can be ranked around The Rephrasium.