Frozen Mimics

Frozen Mimics are War Mode enemies that spawn rarely in the Underground Snow in War Mode. They are stronger than their Hard Mode predecessors, dealing much more damage and having much more HP. Like many normal Mimics, they will start off looking like a chest and then reveal themselves to be what they are. They have a very different A.I than the Hard Mode mimics and are much harder as a result.

A.I and tips
When spawned, Frozen Mimics will do the following attack pattern.

1: The Frozen Mimic jumps at the player, shooting ice beams that deal lots of damage and freeze the player. These ice beams spread the snow biome to any biomes. This can be used easily to get rid of the corruption, crimson or Hallow, unless in Master Mode, where the Frozen Mimic does not spread any ice except for the area it spawned in. In expert mode the ice beams live for longer, and deal more damage, and also increase the Frozen Mimic's defense while they are alive.

2: The Frozen Mimic performs a giant jump attack and spawns two Ice tornadoes that close in on the player. It will then spawn Ice Spirits that go around it, protecting it. When these Ice Spirits are attacked they will shoot the bullets the player shot at them but faster. They despawn when the frozen mimic prepares its next move.

3: The Frozen Mimic will go back into being a chest and then disappear. It then spawns later right on top of the player's head. In master mode, it has double defense once it spawns and will have this effect for 30 seconds.

4: The Frozen Mimic makes ice rays fall from the sky as it chases after the player at speeds of 52 mph. It has double damage in expert mode and above and in master mode it shoots ice rays much faster and from all directions.

5: The Frozen Mimic spawns an Ice spirit to help it. This is its last attack. After this it continues repeating the attacks.

It repeats this much like normal mimics. If the player tries to escape two Frozen Mimics spawn in the direction they are running - this happens when the player is 30 blocks or more away from it. This becomes 20 in expert mode, and 15 in master mode. Frozen Mimics can also be spawned with the Frost Key.