Orichalcum armor

Orichalcum Armor is a hardmode armor and is ultimately crafted from ore that can spawn in place of Mythril Ore. It requires 54 Orichalcum Bars or 216 Orichalcum Ore total to craft the entire set, including all three helms/headgears. Its stats are similar to those of Mythril armor and can therefore be seen as a direct replacement.

Mechanics
Whenever you strike an enemy a Flower petal spawns at the edge of your screen and shoots to the other end of your screen. The Flower petal will always hit the enemy you hit, however it can hit any other enemy that it goes through. The Flower petal deals approximately 18-25 damage to each target it strikes. A flower petal is also spawned when you hit a projectile that can be destroyed when hit. The Flower Petal appears roughly once per second, provided that there is a source of continuous damage.

Trivia

 * The headgear varient appears to resemble Viewtiful Joe's helmet.
 * The full set with the Orichalcum Headgear may be a reference to Andromeda Shun's armor from the Saint Seiya anime series, as the armor, together with the pink color, look very much like Shun's.
 * The armor's effect "Flower Petal" may be a reference to Andromeda Shun's most famous fighting scene in the Saint Seiya anime series, where he fights an enemy that uses roses as his weapon. It could also be a reference to Byakuya Kuchiki's Senbonzakura (a pink petal-like flurry).Terraria 2013-11-13 10-01-02-25.png, resembling Shun's armor and weapon]]
 * The Orichalcum Helmet looks to be a reference to the Onion Knight helmet worn by the protagonists in the original Famicom version of Final Fantasy III.