The Wrath Shard is a component added by Forbidden Magic. It is one of seven Infernal Shards and can be obtained by killing mobs in the Nether; drop chance is proportional to how much extra damage is inflicted to a mob to kill it. It is used to craft some weapons and the Wrath Cage.
Strange energies swirl through the Nether. On occasion, they have been known to solidify into crystal shards when certain sympathetic events occur.
These crystals are imbued with different vices and have many uses for more unscrupulous Thaumaturges.
There are seven documented types of nether shard, each attuned to a different "deadly sin".
Wrath Shards crystallize around acts of violence. The more excessive the physical force used, the more likely it is for a Wrath Shard to appear.
Sloth Shard congeal when proxies and accidents are used to collect resources without effort.
Envy shards are taken from those who have them by those that covet them.
Pride shards materialize when a creature of truly great power is cut down to size.
Gluttony shards crystallize when someone feasts.
Greed Shards appear when enchantment is used to turn a profit.