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. The event occurs when you place an Eternia Crystal on an Eternia Crystal Stand. Enemies will spawn from both sides of the map and move toward the crystal. The event has multiple tiers, with each tier increasing in difficulty. The base you build must account for enemy spawn points, their movement patterns, and the need to defend the crystal from all sides.

To start, choose a flat area for your base. This makes it easier to control enemy movement and set up defenses. Clear out any obstacles and ensure the area is wide enough to accommodate your defenses. The base should be centered around the Eternia Crystal Stand, with enough space to move around and fight enemies.

Next, build walls or barriers to funnel enemies into specific paths. Use blocks like stone, wood, or any solid material to create walls that guide enemies toward your traps and kill zones. Leave small gaps or openings in the walls to allow your attacks to reach the enemies while limiting their movement. This strategy helps control the flow of enemies and prevents them from overwhelming you.

Traps are essential for defending your base. Use dart traps, flame traps, and spear traps to deal damage to enemies as they approach. Place these traps along the paths youÔÇÖve created with your walls. Activate the traps with pressure plates or timers to automate the defense. Lava traps can also be effective, but be careful not to place them too close to the crystal, as they can damage it.

For additional defense, consider building platforms or towers for ranged combat. These structures allow you to attack enemies from a safe distance while keeping the crystal protected. Use platforms made of wood or other materials to create multiple levels, giving you a height advantage. Equip yourself with ranged weapons like bows, guns, or magic spells to take down enemies from these platforms.

NPCs can also play a role in defending your base. Place NPCs like the Tavernkeep, who sells items specifically for the Old One's Army event, near your base. Other NPCs with ranged attacks, such as the Arms Dealer or the Wizard, can help fend off enemies. Ensure their housing is secure and within the base to keep them safe during the event.

Resource management is crucial for building a strong base. Gather materials like stone, wood, and iron to create walls, traps, and platforms. Crafting stations like the workbench and anvil are necessary for making traps and other defensive items. Stockpile healing items like potions and food to sustain yourself during the event.

Common mistakes to avoid include placing the crystal in an open area without defenses, which makes it an easy target. Another mistake is not testing your traps and defenses before starting the event. Always test your setup to ensure everything works as intended. Additionally, avoid using too many explosive traps, as they can damage the crystal if placed too close.

Advanced techniques include using actuators to create retractable walls or traps. This allows you to control when and where enemies can move, giving you more flexibility during the event. You can also use teleporters to quickly move between different parts of your base, allowing you to respond to threats more efficiently.

Class and equipment considerations are important for surviving the event. If youÔÇÖre playing as a ranged class, equip yourself with high-damage weapons like the Megashark or the Daedalus Stormbow. For melee classes, use weapons with wide attack ranges like the Terra Blade or the Solar Eruption. Mages should focus on area-of-effect spells like the Razorblade Typhoon, while summoners can use minions to distract and damage enemies.

In summary, building a base resistant to the Old One's Army event requires careful planning, strategic placement of traps and defenses, and proper resource management. By following these steps and avoiding common mistakes, you can create a base that effectively protects the Eternia Crystal and helps you survive the event.