Range: Self (15-foot cone)

You channel your blood through your Bloodhammer and unleash a devastating crimson shockwave.

You swing your Bloodhammer, releasing a massive spectral hammer made of condensed blood and magical energy.

Every creature in a 15-foot cone must make a Strength saving throw against your spell save DC.

On a Failed Save

The creature takes:

1d8 force damage + 1d6 necrotic damage

and is pushed 5 feet away from you.

On a Successful Save

The creature takes half damage and isn't pushed.

Blood Stack Enhancement

This is where the spell becomes much more interesting.

When you cast Bloodhammer's Ruin, you may expend 1 Blood Stack.

If you do, the spectral Bloodhammer becomes significantly more powerful.

Choose one:

Crushing Blow

The push increases from 5 feet → 15 feet.

If the creature collides with a solid object, it takes an additional 1d6 bludgeoning damage.

Blood Cleaver

One creature hit by the spell takes an additional 2d6 necrotic damage.

Ruinous Impact

The cone increases from:

15 feet → 20 feet

Blood Frenzy

While in Blood Frenzy, you can use Crushing Blow without expending a Blood Stack.

You still need to expend a Blood Stack for the other two options.

Critical Blood

I'd also give Bloodhammer's Ruin a special interaction with critical hits.

Ruinous Critical

If your Bloodhammer attack immediately before casting Bloodhammer's Ruin was a critical hit, the next Bloodhammer's Ruin you cast before the end of your next turn gains:

+1d8 force damage.

If you're in Blood Frenzy, it instead gains:

+1d8 force damage + 1d6 necrotic damage.

This creates a really satisfying Bloodhammer playstyle:

Critical Hit → Blood Stack → Bloodhammer's Ruin

Bloodhammer's Ruin Scaling

The Blood Stack bonus damage from Blood Cleaver remains separate.