I propose a tank counterpart to conqueror

Infallible: Gain 2% premitigation damage reduction per second in combat, up to 10% (make it the same stacking mechanic as conqueror). At max stacks, heal for the amount of damage negated (after armor and mr) as well.

This is a rune that everyone can use to some extent, but a rune that also becomes better the tankier you are.

I made it heal for that amount as well to act as post mitigation damage reduction that can be countered to some extent with grievous wounds. This rune would give tanks a small amount of impenetrable defense as well as rewarding them for building more tank stats, while simultaneously not being outright impossible to fight back against.

So mathematically speaking: a champion who has his armor/magic resist penetrated and resisted until he/she only has 100 left would be taking 1-0.9*100/(100+100)-0.1=0.35 times as much damage as opposed to 0.5 times as much damage (after surviving for 5 seconds). Against grievous wounds this would go up to 0.39 times as much damage. This could be further fine tuned to be a little bit weaker, but the rough idea still stands.

Edit: Ah yes, please downvote and don’t explain why you find it unappealing. Seriously though, I want there to be a reason to pick tanks. Let me know what you think and discuss what’s wrong and what can be improved with the rune.