The Outer Tunnels · area boss

Brother Ossian, the Blood Tithe

the Blood Tithe

A named threat of The Outer Tunnels, encountered rarely and never in numbers - real Dungeons & Dragons statistics, no auto-computed shortcuts.

CR 12 Human · Humanoid 1 / Cleric 3 / BlackBloodCultist 8 DEATH · DESTRUCTION domains resref ot2_ossian

Stat block

STR
20
+5
DEX
14
+2
CON
16
+3
INT
10
+0
WIS
16
+3
CHA
12
+1
Hit points
112
Natural AC
3
Skills
Concentration 14 · Intimidate 15
Feats
PowerAtk, Cleave, IronWill, BlindFight, Toughness

Prepared spells

LevelKnown / Prepared
1Bane, Cause Fear, Doom
2Death Knell, Desecrate, Inflict Moderate Wounds

Combat sequence

Layered on top of the module's own combat AI, which still picks targets and positioning. The fight below moves through real hit-point-gated phases; every save DC and attack bonus computes from the stat block above at runtime.

I

Blood Rite

A 5-round window from round one

If the party doesn't answer with enough damage before the window closes, the rite completes on its own - and grants him a haste and fury that never leaves.

II

A Second Try

The first time he's seen at half health, if the first rite failed

One more window, shorter, one more chance for the tithe to be paid.

III

After that

No further attempts

The rite either completes, or it never will.

Why these numbers

CR 12 is set against The Outer Tunnels's own real ambient ceiling, not auto-computed from level alone - a genuine Humanoid 1 / Cleric 3 / BlackBloodCultist 8 build at 12 total levels.

Hit points (112) follow this project's own average-hit-dice convention, and every save/attack bonus derives from the ability scores above at runtime - nothing here is hardcoded past the phase gates themselves.

How it's wired

Boss-flagged (bypasses the drop-rate roll, two loot-generation passes) and gated to a single spawn - only one Brother Ossian is ever up in The Outer Tunnels at a time.