Orchid Mod/Titanium Spangenhelm

The Titanium Spangenhelm is a craftable Hardmode  that triggers a set bonus with Titanium armor.

It gives 11 defense, 7% increased shamanic critical strike chance, 16% increased shamanic damage and increases the duration of the player's by 4 seconds.

Its set bonus makes the player briefly invulnerable after striking an enemy.