The Blood-Bathed Aspect is just about the most valuable aspect of the Necromancer class in d4 buy items because it significantly improves its Blood Surge skill, which is the basis of many Necromancer builds.
Luckily, there exists a surefire method to obtain the Blood-Bathed Aspect (unlike some aspects which might be random drops), and you also don't need to obtain that far into your game for this. You just need to find the correct dungeon.
Where To Find The Blood-Bathed Aspect
The Blood-Bathed Aspect is obtained by completing the Hoarfrost Demise dungeon, that exists to the approximate northeast of Kyovashad in Fractured Peaks, the game's opening city, as seen above. The dungeon might be immediately accessed, so all you want to do is arrive there.
How To Complete The Hoarfrost Demise Dungeon
The constructs shoot out ghostly projectiles that home in on your d4 buy items character and deal a lot of damage, all while large mobs continually spawn around them, so make sure you keep your eyes open to make good utilization of that Evade button.
The locations of the three skeletal constructs are marked inside the prior three images with the character icon. Once all constructs have already been destroyed, head over to your location marked from the image below, in which a previously closed gate will be open, letting you fight the dungeon boss.
The boss involved is the Khazra Abomination. If this will be the first time you've fought them, look out for its charging attack, the way it's undoubtedly its fastest and many unpredictable moves. It shoots out poison pools, usually in patterns of three. Do your very best to have your evade available following the third wave of poison projectiles, the way it's quite tough to dodge the charging attack without them.
If you're running Blood Surge along with your Necromancer, the Blood-Bathed aspect is important, the way it makes the Core skill hit double as many times (albeit your second hit only deals 30% on the regular damage). Doing this allows your Blood Surge to make stacks of Overwhelming Blood faster, leading to way more frequent Overpower hits.