This Ruler can J-activate into Enforcer of Grudge (J) .
Enforcer of Grudge
Enforcer of Grudge
Attribute: Darkness D
Card Type: Ruler
Race: Black Ones
Abilities: [J-Activate] Pay Void 0. You can activate this if you have four or more resonators in your field.

[Activate] D , Rest : Target player chooses a card in his or her hand at random and discard it.

Sets and Rarity:
[Valhalla Cluster] The Dawn of Valhalla [EN]

[Valhalla Cluster] The War of Valhalla [JP]
(2-109 — Uncommon)