Minecraft Dungeons:Pillar

Pillars are objects in the Howling Peaks DLC that spawn mobs $$.

Appearance
As its name suggests, a pillar is a small stone pillar. It has a few small runes on its sides and one larger one on top; these runes glow blue and purple while the pillar is active. The bottom of the pillar has a few open spaces with gold inside them, which can be attacked and used to eject wind. Pillars are surrounded by a box-shape floor tile which also glows purple and blue while the pillar is active.

Spawning
Pillars can be found in the Colossal Rampart and the Gale Sanctum, where a few of them are found per level.

Behavior
When a player gets nearby a pillar, it activates and begins glowing. The pillar then begins spawning mobs in the same fashion as a mob spawner, but the pillar spawns different mobs and does not have a visible health bar. The mobs that a pillar can spawn include: As mobs spawned by the pillar are killed, the pillar begins deactivating and may occasionally eject gusts of wind from itself, which push away nearby entities. After more mobs are killed, the pillar is eventually deactivated. On Multiplayer, the pillar spawns mobs a lot more often.

Opening Doors
Pillars are often used to open doors and gates, where a nearby one is closed after the pillar activates. Once the pillar is deactivated, the door/gate opens again and the player is free to pass.

Tempest Golem
Two pillars appear on each side of the tempest golem's arena, where they play an important role during the boss battle. The pillars are linked to the tempest golem's arms, so deactivating one of the pillars also deactivates one of it's arms. If both are deactivated, the tempest golem will become stunned and vulnerable to attack. The pillars reactivate after the tempest golem's stun period is over, and both of them immediately deactivate when the boss dies. They can also deactivate squall golems but will restore once the pillars are reactivated to support the tempest golem. Each pillar took half the amount of time to deactivate as compare to the rest of the pillars.