How do I build a base that is resistant to Old One's Army events in Terraria?

Building a base resistant to the Old One's Army event in Terraria requires careful planning, as this event involves waves of powerful enemies attacking a central point, the Eternia Crystal. The goal is to protect the crystal while fending off enemies. HereÔÇÖs a detailed guide to help you create a base that can withstand the event.

First, understand the mechanics of the Old One's Army event. The Eternia Crystal is placed on a stand, and enemies will spawn from both sides of the map, targeting the crystal. The event has multiple tiers, with each tier increasing in difficulty. The base must be designed to funnel enemies into kill zones while protecting the crystal from direct damage. The event is triggered by placing an Eternia Crystal Stand and using an Eternia Crystal, which can be purchased from the Tavernkeep NPC.

To start, choose a flat area for your base. This area should be wide enough to accommodate traps, defenses, and pathways for enemies. Clear out any obstacles and ensure the ground is level. The base should be centered around the Eternia Crystal Stand, which will be the focal point of the event.

Next, build walls around the crystal to protect it from ranged attacks. Use strong blocks like Stone Slabs or Lihzahrd Bricks, as they have high durability. Leave a small opening in the walls for your character to access the crystal, but make sure enemies cannot reach it. You can also place platforms above the crystal to allow for vertical movement and ranged attacks.

Create kill zones on both sides of the crystal. These zones should be areas where enemies are funneled into traps and can be easily targeted by your character. Use blocks to create narrow pathways that force enemies into these zones. Place traps like Dart Traps, Super Dart Traps, and Flame Traps along these pathways. These traps can be activated with pressure plates or timers, dealing consistent damage to enemies as they approach.

Incorporate lava moats into your design. Lava is highly effective against ground-based enemies, dealing continuous damage as they pass through. Place a thin layer of lava in the kill zones, ensuring it is deep enough to damage enemies but shallow enough to prevent item destruction. Use platforms or blocks to control the flow of lava and prevent it from spreading uncontrollably.

Add defensive structures like walls and barriers to slow down enemy progress. Use blocks like Ash Wood or Dynasty Wood to create barriers that enemies must break through, giving you more time to attack. You can also place banners near the kill zones to increase your damage against specific enemy types.

Consider the placement of NPCs. While NPCs can help defend your base, they can also be a liability if they are too close to the crystal. Place NPCs in safe areas away from the main battle zone, ensuring they are protected but still able to assist if needed.

Resource requirements for this base include a variety of blocks, traps, and crafting materials. Gather materials like Stone, Wood, and Lihzahrd Bricks for building. Collect wires, pressure plates, and timers for traps. Lava can be obtained from the Underworld, so ensure you have a way to transport it safely.

Class and equipment considerations are important. The Old One's Army event requires strong combat abilities, so choose a class that suits your playstyle. Melee classes can use high-defense armor and weapons like the Terra Blade or Solar Eruption. Ranged classes should focus on weapons like the Megashark or Tsunami, with armor like Shroomite. Mages can use weapons like the Razorblade Typhoon or Nebula Blaze, with armor like Spectre or Nebula. Summoners should use powerful minions like the Stardust Dragon or Terraprisma, with armor like Stardust.

Advanced techniques include using actuators to create retractable barriers. These barriers can be activated during the event to block enemy paths, then deactivated to allow movement. You can also use teleporters to quickly move between different areas of the base, allowing you to respond to threats more efficiently.

Common mistakes to avoid include placing the crystal in an open area without protection, using weak blocks that enemies can easily destroy, and neglecting to create kill zones. Ensure your base is well-defended and that you have a clear strategy for dealing with each wave of enemies.

In summary, building a base resistant to the Old One's Army event requires careful planning and resource management. Focus on protecting the Eternia Crystal, creating effective kill zones, and using traps and defensive structures to slow down enemies. Choose the right class and equipment for combat, and avoid common mistakes like weak defenses and poor placement of the crystal. With these strategies, you can create a base that can withstand the challenges of the Old One's Army event.