An Optional System of Divine Interaction with Magic
Magic in Khassid is not mere energy — it is the living blood of Xantheris, God of Magic. When mortals channel this divine current, Xantheris may stir. Sometimes he blesses those who wield his essence; other times, he punishes reckless or disrespectful casting.
This optional system adds cinematic tension and narrative flavor to spellcasting. It is designed to reinforce the mythic nature of magic without overwhelming the GM. Use it when you want magic to feel alive — a gift, a risk, and a story in itself.
Design Commentary
The Blood Pulse system is meant to add flavor, not bookkeeping. Most rolls will land in the neutral band (31–70), meaning the GM only references the table about 10–15% of the time. When something does happen, it’s memorable — a sign that the Blood of Xantheris is watching.
Casters can influence their results through offerings or sacrifices. Gems, gold, or magical items can be consumed as part of casting, showing reverence. Most powerful of all is the caster’s own blood — a direct exchange of life for favor.
Important note: Only a caster’s own blood may be sacrificed. Attempting to harm or bleed others does not curry favor with Xantheris and may even draw his displeasure.
Modifier Cheat Sheet
Tradition Modifiers:
+2 — Gravehunters (slow rites, respectful of the Blood)
+1 — Druids, Rangers (natural flow)
+1 — Sorcerers, Wildkin, Spellsingers (innate resonance)
0 — Bards (neutral, can harmonize or grate)
-1 — Clerics, Paladins (divine channeling bleeds the Blood)
-2 — Wizards (structured arcane strain)
-2 — Warlocks (pact magic disrupts natural flow)
Spell Level Modifiers:
Cantrips: +0
1st–2nd: +0
3rd–4th: -1
5th–7th: -2
8th: -3
9th: -4
Upcasting & Blood of Xantheris Modifiers
When a spell is cast using a higher-level slot, its modifier is based on the slot level used, not the spell’s base level.
For example, casting Fireball (a 3rd-level spell) with a 6th-level slot uses the 5th–7th level tier, resulting in a -2 modifier instead of -1.
Sacrifice Modifiers:
- Gems/Gold: 500 gp (+3), 1000 gp (+5)
- Blood: For every 5 HP sacrificed, +1 (up to +5)
- Magical Items: +1 to +3 (DM discretion) — item is consumed as a component.
Intent Modifiers:
- Rage/desperation: -1
- Ritual calm/reverence: +1
Offerings to the Blood: Gold, Blood, and Magic
Sacrifices represent acts of reverence that shift the Blood Pulse roll toward favor. Magic items used as offerings are consumed entirely, dissolving into violet sparks, dust, or vanishing as if unmade. The DM determines the magnitude of favor (+1 to +3) based on the item’s rarity and story significance. Potions and scrolls might be +1, while a treasured wand or weapon could be +2 or +3.
Blood Sacrifice: A caster may give their own life force as tribute — 5 HP per +1 to the roll (up to +5). This is a personal act; harming others provides no benefit and may draw Xantheris’ displeasure.
Gems or Gold: While Xantheris cares nothing for wealth, the act of surrendering valuable materials as components demonstrates humility and respect.
Blood Pulse Table Summary (1d100 + modifiers)
01–15 — Backlash of the Blood (dangerous anomalies)
16–30 — Minor Ripples (cosmetic or narrative omens)
31–70 — Smooth Flow (no effect)
71–85 — Minor Favor (small boons)
86–100 — Blessings of the Blood (significant boons)
Full 1d100 Blood Pulse Table
01–15 — Backlash of the Blood
01 — Catatonia: Spell succeeds, but caster falls unconscious for 1d6 days. Cannot be awakened by magic.
02 — Shattered Mind: Take 12d10 force damage and gain short-term madness (1 hour) and disadvantage on spell attacks for 24 hours.
03 — Blood Burn: Take 2d10 force damage per spell level (max 10d10).
04 — Vein Lock: Cannot cast spells for 24 hours.
05 — The Echo: Spell succeeds, but you are prone, deafened, and take 2d8 damage.
06 — Feedback Pulse: Caster and all within 10 ft take 1d8 force damage per spell level.
07 — Arcane Drain: Lose 1 random prepared spell (returns after a long rest).
08 — Blood Scream: Disadvantage on all rolls until start of next turn.
09 — Static Madness: Speak backward or gibberish for 1 minute; verbal spells require a DC 10 Concentration check.
10 — Burning Veins: Take 1d10 damage and are stunned until start of next turn.
11 — Marked: Skin glows with arcane runes for 1 week (–2 Persuasion with other spellcasters).
12 — Arcane Whiplash: Knocked 15 ft. back and prone.
13 — Seizure of the Blood: Lose concentration and take 2d8 damage.
14 — Bleed Through: Spell triggers a wild anomaly (DM’s choice: illusory creatures, elemental bursts).
15 — Omens of Disfavor: Eyes bleed for 1 minute; disadvantage on Perception.
16–30 — Minor Ripples
16: Hair and objects float briefly.
17: Shadows twist unnaturally.
18: A faint heartbeat sound pulses nearby.
19: All flames turn blue for 1 round.
20: A glyph flickers over your hand.
21: Coppery smell fills the air.
22: Tiny sparks drift off your skin.
23: Faint whispers in an unknown tongue.
24: Your reflection moves independently.
25–30: DM choice (eerie but harmless sign).
31–70 — Smooth Flow
The Blood moves without incident. No effect.
71–85 — Minor Favor
71–72: +1 to spell DC or damage/healing.
73–74: Gain 1d4 temporary HP.
75–76: Advantage on next Arcana/Insight check.
77–78: Next spell: +10 ft range or +1 extra target.
79–80: Concentration checks have advantage for 1 minute.
81–82: Advantage on next saving throw (10 min).
83–85: Recover 1 expended 1st-level slot.
86–100 — Blessings of the Blood
86: +1 damage/healing die.
87: Recover 1d4 expended 1st-level slots.
88: +2 to spell save DCs until end of next turn.
89: Gain resistance to force damage (1 min).
90: Instantly learn 1 hidden truth (DM).
91: Spell’s range or area doubles.
92: Advantage on all attack rolls until end of next turn.
93: Spell does not consume its slot.
94: Recover 1 expended slot (3rd level or lower).
95: Gain 1d8 + mod temp HP.
96: Next spell is cast at +2 levels higher.
97: +1 to all spell save DCs and attack rolls (1 min).
98: Immune to Counterspell until start of next turn.
99: Recover 1d4 expended slots (up to 5th level) and advantage on saves (10 min).
100: The Blood’s Embrace — Spell is maximized and cast at +2 levels higher. Recover all expended slots up to 5th level. For 1 hour, +2 to all spell DCs and attack rolls. Xantheris grants a vision or prophecy.
Punishment Example
A wizard, impatient to prove their mastery, attempts to force a 5th-level spell through sheer will — without the proper components, circle, or even preparation. They believe their intellect alone is enough to bend the Blood.
The DM rolls a 10 on the Blood Pulse check. With the wizard’s modifiers (–3 for level and –2 for tradition), the final total lands squarely in the 01–15 Backlash band.
The spell does take shape, but not as intended — wild arcs of violet fire lash out uncontrollably, dealing 2d10 force damage per spell level to the wizard and knocking them unconscious. When they awaken, their hands are scarred with glowing arcane runes, a silent warning from Xantheris: “Magic is not yours to command; it is mine to allow.”
Favor Example
A cleric kneels beside a dying companion, casting a 5th-level healing spell.
Before beginning, she pours out a 500 gp diamond and smears her own blood (10 HP) across her holy symbol as an offering to Xantheris.
The DM rolls a 78, and with the +3 from the gem and +2 from blood, the result climbs into the 86–100 Blessing band.
The spell not only heals her ally, but Xantheris rewards her respect by restoring a spent 3rd-level slot. A faint pulse of violet light ripples through her veins — the God of Magic nods approvingly.