Forbidden armor

Forbidden armor is a Hardmode armor set consisting of the Forbidden Mask, Forbidden Robes and the Forbidden Treads. Crafting the full set requires 3 Forbidden Fragments and 46 Titanium Bars or Adamantite Bars. It provides a total of defense, increases magic and summon damage by  15% /  25% each, increases maximum mana by 80, and increases the minion capacity by 2 (for a total of 3).

With the full set equipped, a golden, spiky, rune-like object, known as the Forbidden Sign, floats behind the player in a very similar fashion to the Stardust Guardian from the Stardust armor set. Double tapping or  (depending on the "Activate Set Bonuses" setting) will send a beam of dust particles that summon a sand tornado at the nearest block surface beneath the cursor position at the cost of 20 mana. The beam itself does not deal any damage, but the tornado rapidly hits any enemy that comes in direct contact with it for 20 base damage. The Forbidden Sign also casts a faint yellow light around the player, similar to the Mining Helmet.

The dust particles can not pass through solid objects, which means that if there is a solid object between the character and the cursor, the beam will hit the solid object, stop there, and the sand tornado will not be summoned. Only one sand tornado can be summoned at a time, and when a new tornado is summoned, the old one disappears after roughly 1 second. A space of at least 3×12 tiles is required for the tornado to be summoned. If no enemies come in contact with the tornado, it disappears after 15 seconds.

Tips

 * In terms of stats, this set is less powerful than Mythril armor with the mage headpiece, the Mythril Hood. Although, with efficient use of the sand tornado and the extra minion slots one could get higher than with Adamantite armor.
 * The set bonus can be very useful for fighting The Destroyer and other worm enemies, as the sand tornado can very rapidly hit multiple segments.
 * If only summoning bonuses are needed, it may be a better idea to simply go for Spider armor instead. Spider armor can be obtained directly after Hardmode begins and offers superior summoning bonuses.
 * Though it is weaker than Spider armor and Obsidian armor for pure summoners, its mixed nature is useful for summoners playing on harder difficulties, especially in, as magic weapons allow for much safer strategies when fighting mechanical bosses.

Trivia

 * The Forbidden armor is the Desert counterpart to the Snow biome's Frost armor, as they are both obtained similarly. However, Frost armor buffs melee and ranged weapons instead of magic and summon weapons.
 * The set resembles the Egyptian god of death and funerals,, who is known for being depicted as a man with a canine head associated with death.