Ice Golem

The Ice Golem is an uncommon hardmode enemy that is found in the Snow biome during a Blizzard. It possesses a damaging melee attack as well as a ranged laser which freezes players. They are immune to the Poisoned, Venom, Confused, and Frostburn debuffs. They can be found during both day and night. A good way to know one has spawned is a blue laser beam somewhere in the air.

It is possible to farm Ice Feathers if prepared properly in early hardmode, allowing the player to acquire upper-level wings easily. Ice golems, like all enemies, are more common at night due to higher enemy spawn rates. Ice Golems can also, although rarely, drop the Frost Staff which is a strong weapon in early hardmode.

It is possible to get more than one item dropped from the golem, although quite unlikely.

Method 1

 * Since the laser originates from its head, and they are very tall, a safe way of defeating them is to dig a short 3-block-high tunnel level with its feet and continuously attack it. The other effective method is attacking it through walls using a weapon such as the Chlorophyte Saber, Nettle Burst or Mushroom Spear.

Method 2

 * Take your Nimbus Rod, make a wall about 3 blocks thick and about 8-9 blocks tall, and when the Ice Golem comes throw down the clouds from the Nimbus Rod just on the other side of the wall and then hide behind the wall. The clouds will make the Ice Golem not flee despite not seeing the player, and the Ice Golem will die after a short time.

Method 3

 * Build a small box 10-15 blocks above ground (you need to fit in there), then make a 1 block wide hole in the bottom of the box and shoot the Ice Golem from that hole with a fast ranged weapon (e.g. Repeater or Clockwork Assault Rifle) and when it dies and drops the loot, break another block to fit in, collect the loot, go back into your box and put the newly destroyed block back to continue farming.

Trivia

 * The projectile it shoots is named "Ice Beem." Note the spelling on "Beem."
 * There was a glitch where if you were frozen by one of its ice beams your vanity items would not show while you were frozen, but it would show the armor you had equipped and any dye that was equipped at the time. But vanity items would show again after frozen Debuff wore off.