I like the beacon beam idea. As for story mode, we came up with the Engineer on our own. So what if a Minecraft spinoff also thought up the idea of an evil supercomputer? Plus the Engineer is more steampunk than digital.
I thought the Engineer would be immobile, as it's strength is mental not physical. Perhaps the Engineer could analyze the player's actions and spawn the best auto/shock/jugg ratio based on their actions. And even though technically the Engineer is only the red eye, in the game's lore the entire gear is him. The battle consists of the player destroying blocks around the room that are part of it's "system". The eye only follows the player around and shoots the laser.
Official Description: The Wintry’s bigger badder cousin, the fearsome Ice Trolls inhabit the Frist’s crystal caverns. If you see one, run.
Alternative Names: Frost Troll (or giant), Frist Troll, Yeti, Goliath
Ice Trolls would be hostile mobs spawning underground. With 1.13 cave air will replace regular air in caves, so this shouldn’t be too hard to add. Ice Trolls, for some strange reason, will never go outside preferring to let the player escape than see the sky. If it is spawned outside it will rush to the nearest cave, if there is no cave it runs in circles.
However, this will rarely be a concern, as trolls typically spawn in the cavern depths (though most caves are at least somewhat lit from the crystals). Trolls are not common, in most mining expeditions the player will not run into them. In the rare event a troll does spawn nearby, they are thankfully very loud.
Trolls have a good sense of smell, able to pick up players from as far as 24 blocks. But Trolls are hoarders, and they keep their precious jewelry to themselves. If a player mines a crystal, all Trolls within a 48-block radius will be alerted (if there are any).
The ice troll has two attacks- smash and snatch. The first and most common is smash. The Troll will throw on of it’s fists into the air and smash the ground, causing a damage to all players within an 8-block radius. You can avoid smash by keeping a far distance from the slower troll or jumping right as the hand is about to come to the ground. Smash deals 6 health points each.
The second attack is snatch. The troll will rush up to the player and try to grab them with it’s hand. If the hand touches the player model, it will “snatch” them. The player is moved up and towards the face of the troll, where it “bites” them. Afterwards the player is dropped, and fight continues. While snatch only deals 4 health points, the main point is to give the player the “freezing” effect. During freezing, your hearts turn icey blue and you periodically lose the ability to move for a second. This could be fatal when trying to counter smash.
In order to defeat an ice troll, you’ll need strong armor and quick reflexes. Jump the smash attacks and avoid snatch at all costs. Trolls act sort of like minibosses. You will almost never find two together.
Ice Trolls have 100 health points, equal to an iron golem. When killed they drop a Troll Tooth/Fang (alternatively Yeti or Goliath). The tooth can be used to brew a Potion of Freezing. The negative of freezing is the Potion of Warmth. During warmth, the player cannot be affected by freezing at all (very useful in blizzards). Soups will provide the player with 30 seconds of Warmth after eating, but for a longer more practical source use the potion.
A bit related, a bit unrelated.
Brass trumpets are one of many loot items found in the gear. These instruments appear to have been constructed by the creators of the gear for fun, before the apocalypse. Now all they do is gather dust. The player can use the trumpet by holding right click, and a simple note will play.
When a trumpet is played most surrounding mobs will react. Passive mobs spin for a short while, as if they are dancing along with the music. But the main purpose of these is for hostiles. When played a trumpet will call the attention of all hostile mobs within a 16-chunk area.
All the mobs will rush towards you, which makes trumpets very situational. You should only play one if you have full diamond armor and feel confident in your combat abilities. Otherwise you will not be very happy. But if you can fight off the mobs you be rewarded with loads of loot. This can come very handy for hunting the rarely spawning ice trolls.