Infinity Tower Floors 50–100 Guide — Boss Patterns, Min Stats & Strategies

TL;DR: Floors 50–100 in the Infinity Tower require a fundamentally different approach than the early game. Burst damage stops working at Floor 70. The winning strategy above Floor 80 is sustain + debuff management. This guide breaks down every 10-floor boss and the minimum requirements to pass each threshold.

What Changes Above Floor 50

Below Floor 50, you can brute-force most floors with high ATK stats. Above Floor 50, three new mechanics activate:

• Armor Scaling: Enemy DEF grows exponentially above Floor 50. Raw ATK loses value relative to skill-based damage and debuffs.
• Boss Enrage: Bosses at floor multiples of 10 enrage at low HP — attacking them with standard moves during Enrage Phase adds damage to you. You need a "kill window" strategy.
• Poison Floors: Floors 55–65 have a passive poison that ticks 2% max HP per turn. Sustain builds are mandatory; burst builds require consumables.

Minimum Stat Requirements by Checkpoint

Floor 60 Boss — The Armored Warden

The Armored Warden's Enrage Phase triggers at 30% HP, adding 150% of all damage you deal back to you as reflected damage. The kill window is 2 turns between your burst skills coming off cooldown. Strategy: bring HP to exactly 35%, then burn both skills in consecutive turns before Enrage triggers.

Best classes: Blood Mage (shield absorbs reflected damage), Shadow Assassin (burst fits in 2-turn window)

Floor 70 Boss — The Mirror Shade

At 50% HP, the Mirror Shade reflects all physical damage you deal. Switch to magic skills exclusively below 50% HP. Shadow Assassin players need to respec to a magic-heavy skill rotation for this fight — physical crit builds cannot finish this boss without taking massive self-damage.

Best classes: Blood Mage (all-magic build), Pack Shaman (totem damage is magic-typed)

Floor 80 Boss — Eclipse Titan

At 60% HP, the Eclipse Titan summons 2 minion adds that each deal 200 damage per turn and must be killed before you resume damaging the Titan. AoE skills are the fastest solution. Without AoE, you must single-target the adds — which costs 2–3 turns and lets the Titan regenerate HP.

Best classes: Berserker (best AoE in the game), Moon Warrior (Storm Slash hits all targets)

Floor 90 Boss — The Void Sovereign

The Void Sovereign has a permanent 20% damage reduction aura that cannot be removed. You can only bypass it with the Armor Break debuff (Pack Shaman's skill "Pack Howl" or the item "Shatter Rune"). Without Armor Break, you need to outstat the boss by ~25% above the minimum stats listed above.

Best classes: Pack Shaman (Pack Howl bypasses aura), Blood Mage (drain damage ignores the aura partially)

Floor 100 Boss — Aeternum Prime

Aeternum Prime is the hardest boss in the game. It has 3 phases:

1. Phase 1 (100%–60% HP): Standard boss — high ATK, high DEF
2. Phase 2 (60%–30% HP): Adds a stacking DEF buff every 2 turns — you have 6 turns to burst through before DEF becomes impenetrable
3. Phase 3 (below 30% HP): Enrages + heals 5% HP per turn — must kill in 3 turns or it heals faster than you damage

The winning pattern: save all cooldowns for Phase 3 entry. Enter Phase 3, use 3 consecutive max-damage skills, and kill before the heal outpaces damage. Classes without 3+ damage skills on cooldown cannot complete Phase 3.

Best classes for Floor 100: Shadow Assassin (3 high-damage skills), Berserker (Rage Mode removes HP scaling), Blood Mage (shield absorbs some Phase 2 stacking damage)

Consumable Recommendations for Floors 50–100

• HP Potions (Large): Carry 5 per session — floors 65–79 will use them if you're at minimum stats
• Mana Crystal: Resets 1 skill cooldown. Reserve for Floor 100 Phase 3 window
• Antidote: Removes poison. Mandatory for floors 55–65 (poison floors)