Overview
The Cooldown Tome boosts your character's Attack Speed, a global stat that reduces the time between attacks for all weapons. This makes projectile weapons fire faster and melee weapons swing more rapidly, directly increasing your damage output and on-hit effect triggers.
According to v1.0.7 community documentation, Tome upgrades stack additively with each level providing the same percentage increase. Different rarity tiers apply multipliers (Common baseline, with Uncommon at 1.2×, Rare at 1.4×, Epic at 1.6×, and Legendary at 2.0×) to the base +7.5% per level value.
How Attack Speed Works
Attack Speed is a character-level stat that affects all equipped weapons, reducing their attack intervals universally. This makes it one of the most versatile offensive upgrades in the game.
- Universal Application: Affects every weapon you use during a run
- Additive Scaling: Each level adds the same percentage increase (not multiplicative or exponential)
- Rarity Matters: Higher rarity Cooldown Tomes provide larger boosts per level
- Immediate Impact: Attack speed changes are noticeable from the first upgrade
Synergy Guide
Example High-Synergy Weapons
These weapons are commonly mentioned in community discussions as benefiting noticeably from increased attack speed:
Strategy Guide
- Early Priority: Often recommended as an early Tome investment due to immediate DPS improvements
- Universal Value: Works effectively with virtually every weapon and playstyle
- On-Hit Builds: Essential for builds relying on on-hit effects like Kevin+Mirror combinations
- Healing Synergy: Significantly increases healing rate when combined with lifesteal items
- Build Foundation: Core component of popular community builds like "Speed Demon" and "Bullet Hell"
Important Considerations
- Balance Defense: High attack speed without sustain or defensive stats may leave you vulnerable
- Resource Management: Faster attacking may require more careful positioning and resource awareness
- Complement with Survivability: Consider pairing with defensive Tomes like Health, Armor, or Evasion for balanced progression
- Movement Speed Balance: Pair with Agility to maintain kiting capability
Theoretical Maximum Potential
- Community Consensus: Most sources indicate Tomes can reach level 99
- Common Rarity Calculation: At 7.5% per level × 99 levels = approximately 742.5% attack speed increase (theoretical)
- Higher Rarities: Legendary (2.0× multiplier) would theoretically provide 1,485% increase at max level
- Important Caveat: These are mathematical projections based on community data; actual in-game caps and mechanics may differ
- Official Documentation: No official formula or hard cap has been publicly confirmed by developers as of October 2025
Community Tips
- A highly valued offensive Tome frequently featured in community build guides
- Enhances synergy potential when combined with other scaling Tomes
- Particularly effective with characters that have built-in attack speed bonuses
- At higher levels, dramatically transforms weapon feel and performance
- Commonly included in high-damage focused build strategies shared by the community