I might as well post some rough ideas ive had about tanks. 1 was a spider type thing but since elise.... yeeeeah kinda gotta scrap it or make the ult i had imagined into something like an intelligent mole, sorta like twitch's origins that will grow based on him health, which will also increase his damage. so i guess i'll pitch the idea.
Passive: Increases size by 10% for every 500 bonus hp. Also receives 5% more additional HP, this does not stack.
Passive: Improved animal senses give the mole 100 increased site range and 25 bonus speed.
Active: The mole goes on a rampage, gaining 75/125/175/225/275 max hp 10/20/30/40/50 armor and mr also gains 50 attack range for 10 seconds. Also reduces nearby enemy damage by 2/4/6/8/10% for the duration.
Infectious bite deals 80/125/170/215/260 damage + (1% bonus HP) half the damage is instant the other half is over 5 seconds. During the 5 second bleed, the target is slowed by 50% and loses 10% damage.
Flings mud in a cone in front of the mole, dealing 70/105/140/175/210 + (.8xAP) to all enemies in the range. Will blind targets for 1/1.5/2/2.5/3 seconds.
The Mole burrows underground, creating an impassable barrier in a circle around where he entered the ground. For the next 5 seconds, the mole is untargetable and may move around underground, upon passing under champions they are knocked up for 1.5 seconds and receive damage based on 5%/7.5%/10% of the mole's total HP.
Long cd, high mana cost