boss
The Twins
First Hardmode mechanical boss (Retinazer & Spazmatism). Summoned at night with a Mechanical Eye.
The Twins are the first of the three mechanical bosses. Summon at night with a 
Mechanical Eye. Retinazer (red, laser) and Spazmatism (green, cursed flames) each have a second enraged phase below 50% HP. Drops 
Hallowed Bars and Souls used for Hardmode gear. Defeating all three Mechanical bosses lets the 
Steampunker arrive and enables 
Plantera bulbs to grow.
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