User blog comment:Poisonshark/Custom Item: Eunju's Spear/@comment-25228021-20161220213209

This item is obviously meant as an early-game item, with the goal to make the most out of getting a lead in lane, which kinda conflicts with its malleable build path (1.1) and which are there to also ensure you don't get too far behind.

It's also good for brawlers/divers/skirmishers who have trouble getting in enemy lines in a timely manner, since now when they do, they get a lot of sustain.

Who fits those two criteria the best? Riven. She loves all the stats this item gives her, she can use to the fullest with her shield tanking some of the damage she takes when she runs in, and her passive and numerous AA resets increasing her damage, and with it the health recovery. Does that mean she would build this? Probably not. She would obviously like a more offensive item first, like Black Cleaver or Ravenous Hydra. I could see it being picked as a second item, ironically.