(Image credit: Tyler C. / Blizzard Entertainment) Out of all the new things added to Diablo 4 with its new Lord of Hatred expansion , Echoing Hatred might be the most mysterious. It's not a dungeon, nor is it a boss fight: It's a fight to the death against relentless waves of monsters. But the only way to play it is by finding a rare item drop. While I was reviewing the game on an early access server provided by Blizzard a few weeks ago, I never found a key to Echoing Hatred. I played the expansion for a little over 45 hours and in that time I completed the new campaign, fully geared up a warlock, climbed through most of the new Torment difficulty tiers, and did a little bit of fishing. It wasn't until the very last day the servers were up that I finally decided if I was ever going to see Echoing Hatred, I'd need to cheat. Article continues below (Image credit: Tyler C. / Blizzard Entertainment) This is where I should mention the fact that I never died a single time during the Lord of Hatred campaign.…