It is such a rare item, a good niche but that doesn't fit in much builds.
If you had to buff it, how would you do it?
Overall I think increasing the cost and give it some HP, AD or AP could help the item to see some light.
i wouldnt. is what we want is items to be niche and to have items only fit certain champs/builds?
if you over buff it then its too strong and then every one picks it over whatever became weaker
Lower the maximum stacks but raise the amount of MR stolen per stack. Ultimately slightly* I crease the total MR stolen. Right now in a burst meta it simply doesn’t compete with other MR items (maw included) OR compete with AS items (BORK, rageblade)
would need compensation buffs.
literally just remove it OR combine it with Nashor's
You'd have to remove/rework Guinsoo's, because on-hit items are basically not allowed to be good by themselves or they would just be broken with Guinsoo's.
I think if they made it Do like 80-200 (scale with level) on next auto attack ever 2s and steal 6 MR 10 if melee up to 30 When you hit 30 stolen MR heal for 10% of damage done for 5s (45s CD) +200 HP or +40% attack speed if you have over +50% bonus attack speed
Add AP and AP ratio to it so 
can build it
I wish it built out of Recurve Bow, Negatron Cloak, and a Ruby Crystal so it could have less attack speed and 200 or 250 HP. Slightly less optimal for ranged, much better for melee.
Increase its price a bit, have it transfer a portion of auto damage into magic damage. While this might not be the healthiest change, its the only one i can figure out for it that is thematic to the item and isnt just blatantly broken.
