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18. Spellcasting Foundation

Date: 2025-11-22

Status

Accepted

Context

Magic is a pillar of fantasy combat. We needed a system to define spells, manage slots, and cast them.

Decision

We implemented ISpell, ISpellCaster, and CastSpellAction.

ISpell: Defines spell data (Level, School, Range, etc.) and an effect delegate Cast(caster, target).
ISpellCaster: Component attached to ICreature (via Spellcasting property).
- Tracks Spell Slots (Current/Max per level).
- Tracks Known/Prepared Spells.
CastSpellAction:
- Validates caster has the spell and a slot.
- Consumes the slot.
- Invokes ISpell.Cast().
SpellSchool: Enum for the 8 schools of magic.

Consequences

Creatures can now be spellcasters.
Spells are code-defined (for now), allowing complex logic in delegates.
Foundation is set for implementing specific spells and class-based casting rules.