Anti-Burst item active (for ADCs tho)
What if there was an item that granted a short .25 second directional shielding (20 to 35 degree leniency) against 60% damage received from the first source of damage that is a skillshot (projectile) or champion auto attack, converting the damage it would have dealt to the user into extra Move speed based on percentage of health the damage would have done to the user? The buffs would decay based on general tankiness of the user such that the more tanky the user was, the sooner and quicker the move speed decays. There could be an indicator showing when someone who has the item has it off cooldown like for banshee's/GA. and idk. like 210-300s cd after use?
It would provide access for squishier champions to have a skill based counter to assassins based on reaction timing, enabling them to either dip or chase more effectively. Again by the same reasoning it would also let assassins do their job more effectively too, enabling to dip quicker after diving. It would not benefit bruisers or tanks to the same degree as their buffs would decay much sooner, and be less effective to begin with due to receiving less damage to begin with. In some ways it could be considered an offensive version of banshees shield that rewards usage discretion like sivir's spell shield would.
It wouldn't work on chogath's R, pyke's R, or other non-projectile spells, nor would it work off of minion or monster damage of any kind. I can see abuse cases with an extra way to negate veigar nuke, zoe nuke, syndra nuke, and a bunch of heavy AP midlaners as well, but having the indicator show when it's ready alleviates that risk and allows teams to make informed decision making to bait it out.
The overall goal is to provide something that prevents some of the nuke damage that explosive champions can burst down squishier targets with.
What are the extremes you can think of where the item favors a tankier champion build over a damage build?