Force Core (High)

Introduction
A comprehensive list of cores can be found here. Force cores are mainly used for socketing options in empty slots, more info can be fond here. Other types of force cores are as follows:
 * Force Core (Low)
 * Force Core (Medium)
 * Force Core (High)
 * Force Core (Highest)

Obtained

 * Craft: Basic Craft level 8
 * Field: Bloody Ice, Desert Scream, Green Despair, Lakeside, Undead Ground, Forgotten Ruin, Mutant Forest, Pontus Ferrum, Porta Inferno
 * Dungeon: Ruina Station, Tower of the Dead (B1F), Volcanic Citadel, Tower of the Dead (B2F), Forgotten Temple (B1F), Forgotten Temple (B2F), Forbidden Island, Altar of Siena (B1F), Altar of Siena (B2F), Illusion Castle Underworld, Illusion Castle Radiant Hall
 * DX Dungeon: All DX Dungeons
 * Chaos Arena: Chaos Arena Lv. 2, Chaos Arena Lv. 3, Chaos Arena Lv. 4, Chaos Arena Lv. 5