One of my more recent decks, I can't quite recall how I stumbled upon the Nephilim - maybe by wondering what four colour creatures there are - and once I saw Ink-Treader Nephilim I felt a strong need to brew a deck around it. I've seen online rule zero discussions around making Nephilim legendary creatures; but I wanted to stick within the confines of vanilla Commander rules, and so I looked to my options for a four colour commander (not many!), and settled upon Kynaios and Tiro of Meletis.
From here I took the theme of the deck to be a combination of light group hug (by way of ramping/drawing my opponents in my end step), and ways in which getting my 'hidden commander' onto the battlefield, and going from there.
These Ways to Produce Them was originally achieved through powerful tutors, but I didn't necessarily want to make this a bracket 3 or 4 deck - so instead I fell back onto what I had more recently discovered; using my CMD [1] NN deck as inspiration, and bringing Jalira into the 99, along with a few other on-colour tutors, and enjoying my only foray at this point into red; despite my overall feelings towards red as a colour! And being able to add Feather, the Redeemed in here was a powerful way to recur my instants & sorceries that I used on the Ink-Treader.
Finally I put in some Commander Boosts & Protection to keep the Ink-Treader around, and my actual commander too.
The most fun to be had with this deck uses the mechanic on the Ink-Treader, which gives this deck it's name - whatever someone might do to them, gets done unto them. Just about anyway! Which I've broken into three categories; Creating Multiple reature Tokens allows every creature to be target to determine X, the number of creature tokens I then create; Bounce All Creatures as a way of protecting the Ink-Treader and the rest of my creatures if needs be; and finally Single Mana Card Draw - if the board is densely populated this can be a risk, as you can end up drawing much of your deck (see later); but the thinking here is two-fold:
Firstly you get a whole bunch of cards in your hand to play with; and secondly there is the Card Draw Payoffs which is mainly creating a bunch more creature tokens.
With all this card draw, both No Hand Limit! and Recovering Creature from Graveyard to Hand help you both retain many cards in hand and therefore options, and to keep you from milling yourself. Ideally!
Typically this deck wins out by tutoring the Nephilim, getting some amount of card draw going; and then by bouncing a large board state of creatures, leaving me with enough tokens to then be a real menace. Not a guaranteed win by any means, but that is part of the fun here!