I'm growing increasingly curious as to what the foulfell shard (found in corrupted items from Wraith-Night) actually does, and I'm willing to lend out a few of my corrupted items to test my theory.
Basically, people are saying that the inscription counts whenever you kill a hero classified as a demon (like Lion, QoP, Shadow Fiend, Shadow Demon).
Anyone willing to try this out? My corrupted items to be lent out are as follows: Lion crabclaw, Slardar basher, Fireborn Odachi, an entire Abaddon set save for the weapon