Gravebloom is a Unique Mace in Diablo IV Season 15. It comes from Random world drop / any Lair Boss (one guide: 'drops at any Difficulty Tier, increased drop rate per Torment tier'); 3.2.1: all Uniques drop from level 1 in any Difficulty; targetable via Horadric Cube reroll.
Unique power
You raise 3 smaller Golems that each deal [40 - 60]% of normal damage and gain 30%[+] Attack Speed. Golems respawn 50% faster.
Affixes
+10.0% Attack Speed (inherent)
+[1 - 2] to Golem Mastery
+[36.5 - 50.0]% Chance for Golem to Hit Twice
+[489 - 526] Maximum Life
+[80 - 94] Intelligence
Where it drops
Random world drop / any Lair Boss (one guide: 'drops at any Difficulty Tier, increased drop rate per Torment tier'); 3.2.1: all Uniques drop from level 1 in any Difficulty; targetable via Horadric Cube reroll