Because Bone comes unlocked, many players underestimate it. Equip Calcium, embrace his speed scaling passive, and watch every thrown bone ricochet through five enemies. The playstyle is pure kiting—stay mobile, corral enemies into packs, and let the weapon’s natural chaos do the rest.
- Projectile bounce lets each bone strike several targets in a single throw.
- Calcium’s speed-to-damage scaling multiplies both throw rate and damage.
- Pairs wonderfully with other bounce-capable weapons like Lightning Staff.
Unlock Default Equip Calcium to see the intended playstyle.
Core scaling Bounce → Projectile → Attack Speed
Skill demand Low Focus on movement and letting bounces work.
Best pilots Calcium, Bandit, Fox
Bone Rank Milestones
| Rank | Bones | Bounce Count | Bonus |
|---|---|---|---|
| 1-5 | 1 bone | 1 bounce | Base ricochet |
| 6-10 | 2 bones | 2 bounces | +10% projectile speed per rank |
| 11-15 | 3 bones | 3 bounces | Adds minor slow on hit |
| 16+ | 4 bones | 4 bounces | Bounces prioritise elites |
- Projectile bounce stat stacks with rank bonuses; chase shrine rerolls if you are unlucky.
- Speed affects firing cadence; stay healthy to maintain Calcium’s speed stacks.
Core mechanic breakdown
Ricochet lanes
Funnel enemies into tight formations so bones bounce cleanly without wasting hops.
Speed equals damage
Calcium’s passive converts movement speed into damage. Avoid hits to keep the multiplier high.
Hybrid coverage
Use Bone to soften crowds while a secondary weapon handles bosses and stragglers.
Mod priority and alternatives
Must-have mods
- Projectile Bounce Tome rank 10—Bone is defined by it.
- Projectile Tome rank 8 to get three bones on screen quickly.
- Attack Speed Tome rank 8 so ricochets never stop.
Flexible picks
- Agility Tome for Calcium to push speed stacks even higher.
- Damage Tome once bounces consistently chain through packs.
Situational tech
- Luck Tome with Fox when farming rare bounce relics.
- Health Tome if you are learning Calcium and take chip hits often.
Recommended build patterns
Speed Demon Calcium
Signature build that turns velocity into death.
Core mods
- Projectile Bounce Tome 10
- Attack Speed Tome 9
- Agility Tome 9
Priority relics
- Turbo Boots
- Turbo Socks
- Golden Boots
- Anvil
Gameplay notes
- Never stop moving—speed stacks fuel both damage and throw rate.
- Kite enemies into loops so bones bounce through entire packs.
- Avoid damage entirely; losing speed halts the ricochet machine.
Bounce Master
Stack bounces and pair with Lightning Staff for chain mayhem.
Core mods
- Projectile Bounce Tome 10
- Projectile Tome 8
- Cooldown Tome 6
Priority relics
- Bounce Coupler
- Lightning Rod
- Anvil
- Echo Shard
Gameplay notes
- Line up bone and lightning bounces so enemies pinball between effects.
- Take bounce shrine rerolls every time—they are priceless.
- Stay at mid-range to keep both weapons connecting consistently.
Hybrid Bone + Revolver
Mob clear with bone, boss killer with revolver.
Core mods
- Attack Speed Tome 8
- Projectile Tome 7
- Crit Damage Tome 8
Priority relics
- Swift String
- Overpowered Lamp
- Anvil
- Speed Boots
Gameplay notes
- Use Bone to control waves while Revolver handles bosses and elites.
- Invest in attack speed; both weapons love it.
- Swap focus depending on encounter—bone for density, revolver for priority targets.
Synergy quick reference
Partner Synergy Usage tips Calcium Speed Demon passive multiplies ricochet damage. Default choice—everything in the kit is built around Bone. Bandit Attack speed passive accelerates bone throws dramatically. Ideal if you prefer aggressive, close kiting. Fox Luck improves bounce upgrade frequency. Fun farming option when you want to chase legendary relics. CL4NK Gives Bone a crit ceiling even though it lacks natural crit scaling. Use when you want to mix bounce crowd control with crit burst.
Weapon matchup comparisons
Axe
- Edge: Bone is stronger early and doesn’t rely on late-game scaling.
- Watch for: Axe surpasses Bone in raw DPS once projectile counts skyrocket.
- Best when: You want forgiving crowd control while learning kiting.
Bananarang
- Edge: Bone requires less precision; bounces auto-select targets.
- Watch for: Bananarang has higher single-target damage once both hits land.
- Best when: Maps have open space where bounces can travel freely.
Firestaff
- Edge: Bone’s bounce pierces better through tight clusters.
- Watch for: Firestaff gives steadier AoE without relying on enemy density.
- Best when: You favour speed-focused builds with constant motion.
Playstyle rhythm and details
Keep enemies grouped
- Lead packs into narrow lanes so bounces don’t waste on empty space.
- If a group disperses, kite in circles until they bunch up again.
Protect Calcium’s speed
- Never stand still—speed stacks decay fast after taking damage.
- Prioritise evasion or shields if you struggle to stay untouched.
Balance secondaries
- Carry a focused single-target weapon to handle bosses.
- Avoid slow, stationary weapons—they break the pace Bone requires.
Operational checklist
- Pick Calcium and keep him damage-free to stack speed.
- Max Projectile Bounce Tome before minute 12.
- Maintain at least three bones on screen at all times.
- Pair with a boss-killing secondary weapon.
- Revisit relic loadouts if speed stacks keep dropping.
FAQ quick answers
Why are my bones not bouncing?
You either skipped bounce upgrades or enemies are too spread out. Focus on Projectile Bounce Tome and regroup mobs.
How do I stop losing Calcium’s speed stacks?
Prioritise dodging over damage. Consider Agility Tome or defensive relics until you learn enemy attack patterns.
Is Bone viable beyond early game?
Yes—max bounce and projectile upgrades plus speed scaling keep it relevant deep into endless mode, especially with Lightning Staff.