Many Diablo 4 players are asking Blizzard to remove summoning materials because grinding them is so tedious at the moment. After unlocking World Tier 3 and 4 in the game, Diablo 4 players will collect items, including Shards of Agony, Mucus-Slick Eggs, and Living Steel, to summon endgame bosses that offer a real combat challenge. These summoning materials are gathered from Tree of Whispers, World Bosses, Tortured Gifts in Helltides, and high-tier Nightmare Dungeons.