It is a fun idea based on this guide, which I wanted to extend on, and, if proven to be viable, make a full-fledged in-depth guide on.

UPDATE: It is, in fact, not viable as a blind pick, but could be of some value against low-damage, AP or skillshot-reliant top laners. The late-game value this pick provides is, of course, very great. At full build, you'll have 3.5k Mana, 6k HP, 150 Armor & MR and 250 to 300 AP. If your opponent knows how to freeze, your only option is to roam and look to get your team ahead in some way.

It is to be noted though that I am not High-Elo and haven't tried this build very much yet. So until I know more, this guide will stay WIP.

If you want to try this out yourself, I'd appreciate all feedback and observations in the comments.

The value of this rune can not be understated. The enhanced AAs not only help with sustain, but can give you some early trading power and will also help you scale into the late game very nicely. Once you get to level 6, you can R into them, throw out your Q and W for 2 enhanced AAs and then slow them with your E to deny a prolonged fight.

Out of all 3 options, Shield Bash is definitely the best. Demolish can only be used in roaming matchups, while Font of Life relies on you hitting your E to proc it. Shield Bash can be triggered with your longest range ability (Q) and gives you extra resistances for the duration of its shield, while also enhancing your next AA. Since it also has %HP scaling, it will only get more useful as the game goes on.

Conditioning is a very good option all around, since it also enhances your scaling. It does offer no early game help though, so you can only take it into weak early-game laners like Dr. Mundo. Second Wind is a neccessity into poke-heavy lanes, and helps with early sustain a lot. Against opponents like Teemo & Vayne, it can help deny a lot of their poke power. Bone Plating is good against opponents that want to trade you a lot, for example Jax & Renekton.

Overgrowth is the only viable rune in this branch right now, but the HP scaling it provides is pretty nice for this build. Revitalizes Heal and Shield Power don't synergize very well with Kassadins kit, and the resistances provided by Unflinching aren't enough to ever warrant taking this rune right now.

This item helps with reaching item powerspikes earlier, which can be very valuable, since you can choose when to leave lane more freely.

Similar to Future's Market, this rune allows for a more safe lane, since it will reduce your Teleport cooldown and make it available more frequently.

I play Urgot Top and Malzahar Jungle, my current elo is B1/S4, I've only played few ranked games so far though.

I've been playing LoL since Mid-2023, and started playing ranked in S14.

I currently don't have a stream or YT channel (for LoL), although I'd like to at some point.