Solar Eclipse

Event
The Solar Eclipse is an event occurring only in Hardmode. It is announced at the beginning of a day, lasting from sunrise to sunset. During the Solar Eclipse the light will be only slightly brighter than at night and you can see the moon in front of the sun. It is caused by defeating a Hardmode boss during a full moon at night time.

Unique Enemies
All of these have great HP and Hit damage, and some of them special features that make fighting them extremely hard. It is recommended to treat this event as a Boss fight mixed with Invasion, since there will be large amounts of very tough and unusually agile enemies, most of which are resistant to knockback.
 * Reaper
 * Swamp Thing
 * Vampire
 * Eyezor
 * Frankenstein

Players wishing to avoid the creatures spawned by this event can easily do so by burrowing underground, which prevents Eclipse enemies from spawning altogether, or by staying inside a floating house, since only the Reapers can pass through walls and they have the same shortcomings as Wraiths, namely, they can only "fly" when inside a wall.

One effective strategy is to plant Tiki Torches to light up the area, and then use the Flamethrower to eliminate enemies. Since the flamethrower reduces forward movement, this will cause it to incinerate entire groups at once, making the Eyezor the only real threat.