9 Kings: King of Blood IX IX Random Ballista Build Guide

To beat the King of Blood at IX IX difficulty in 9 Kings using a Random Ballista strategy, prioritize attack speed upgrades and reload buffs over flat damage, place ballistas in the central grid rows, and introduce crowd-control units in late waves to offset target randomness.

Core Mechanics and Early Upgrades

The Random Ballista fires automatically across the entire grid without requiring targeted manual placement for every shot. At IX IX difficulty, enemy health pools are too large for single-target, low-frequency attackers to clear waves consistently. High projectile volume ensures steady damage distribution across incoming groups.

• Prioritize Attack Speed: Early base damage is adequate for initial waves. Upgrade attack speed and reload frequency first to scale total projectile volume and increase critical hit frequency.
• Deck Thinning: Keep the card deck small. Remove low-value starter cards, static defenses, and high-cost units so that draws consistently yield ballistas, reload buffs, and attack speed modifiers.
• Relic Synergies: Favor relics and spells that add split-shot, projectile speed, or chain effects to complement the ballista's inherent fire rate.

Gold Management and Rerolls

Gold scaling determines whether your defensive line keeps pace with escalating enemy health pools. Static wall structures that do not scale into late waves waste resources.

1. Upgrade Ballista Tiers: Direct gold into raising ballista unit tiers. Higher tiers improve base reload speed, providing stronger scaling than low-tier flat damage upgrades.
2. Maintain a Reroll Buffer: Reserve a portion of your gold during waves to refresh shop choices if a crucial synergy card or unit upgrade fails to appear naturally.
3. Delay Static Defenses: Only invest in auxiliary utility or buffer units after your primary ballista core has reached reliable operational speed.

Grid Positioning

Maximum coverage requires open firing angles across the entire board.

• Center Placement: Position ballistas in the central rows of your formation. Corner placement restricts their effective targeting angles and reduces total board pressure.
• Expendable Frontline: Place cheap, low-cost units in the front row as temporary blockers. Their role is to slow incoming waves and cluster enemies near the center, maximizing multi-target hit opportunities for random volleys.
• Protect the Core: Never place ballistas in the front line. Losing primary attackers early in a IX IX wave leads directly to a lost run.

Late-Game Adjustments for High-Health Waves

Targeting randomness can become a liability in final stages when dense waves contain heavy, single-target bosses or elite enemies.

If high-health enemies break through despite maximum firing speed, shift remaining investments from additional ballistas into crowd control. Adding units that inflict stuns, slow effects, or armor penetration holds target enemies in place long enough for random ballista barrages to focus and eliminate them.