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Piercing
Piercing is a stat that indicates how many enemies the projectile can pierce through before disappearing.
Piercing projectiles deal full damage to every enemy they hit, except for 
Grenade Launcher, which deals half the damage for the pierced projectiles.
If a projectile has both Piercing and Bounce, it will pierce until it cannot pierce anymore then bounce.
Projectiles
Most projectiles in the game start with 0 Piercing. There are some exceptions:
- Two weapons start with 1 Piercing:
Flame Cannon starts with 999 Piercing- Some summons have 9999 Piercing:
- One summon has 1 Piercing:
Dragon Egg - Dragon
Upgrades
| Name | Img | Piercing | Effects | Type |
|---|---|---|---|---|
| Penetration |  |
+1 |
|
Upgrade |
| Reaper Rounds |  |
+1 |
|
Upgrade |
| Gun Mastery |  |
+1 |
|
Synergy |
| Kunoichi |  |
1 |
Increase Fire Rate by 10% and Piercing by +1 every 10 seconds. This bonus is reset upon getting hit. |
Synergy |
| Tome of Power |  |
+1 |
|
Tome |
| Strong Will |  |
+2 |
|
Diamond's Upgrade |
| Cadence |  |
Infinite (every 3rd shot) |
Every 3rd shot has infinite Piercing and double Bullet Size. This shot also deals +20% extra damage per rank (+100% max). |
Rune |