⚒️Anvil Activation Abilities

Abilities on this page are intended for powers.activation-abilities. They are evaluated while an anvil prepares its result rather than by a normal on-... trigger.

Registry keys on this page

• modify_repair_cost

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modify_repair_cost

Purpose: Changes the experience-level cost calculated for an anvil operation when an input item or enchanted book contains the declaring enchantment.

Context: Paper PrepareAnvilEvent. EnchantmentReform scans both anvil input slots, including normal item enchantments and stored enchantments on enchanted books.

Fields

Field	Default	Description
operation	SET	SET, ADD, SUBTRACT, MULTIPLY, DIVIDE, MIN, or MAX.
value	current repair cost	Operand or formula. Supports {original}, {current}, {level}, root Power variables, and PlaceholderAPI when a player is available.

Example

powers:
  activation-abilities:
    double-repair-cost:
      type: modify_repair_cost
      operation: MULTIPLY
      value: 2

Behavior and limits

• {original} and {current} are the repair cost immediately before this configured rule runs.

• The result is rounded to the nearest integer and clamped to 0..2147483647.

• Division by zero leaves the current cost unchanged.

• When the same enchantment appears in both input slots, its rule runs once at the highest input level.

• Rules from different enchantments run by enchantment execution priority, then by namespaced key.

• This ability does nothing when placed under a normal trigger's abilities section.

• The rule is applied after vanilla has produced a valid anvil result. It does not reconstruct operations that vanilla already rejected for another reason.

Bypassing vanilla enchantment maximum levels

Paper servers may enable:

anvil:
  bypass-enchantment-level-limit: true

This allows the anvil to apply enchantment levels above Enchantment#getMaxLevel(). It is separate from modify_repair_cost: the config option controls which levels the anvil may produce, while the activation ability changes the displayed experience-level cost.