John Morris's starting weapon. Lobs an iron ball that drops on enemies and shakes the screen on impact.
Iron Ball arcs above John Morris, then drops straight down on the closest enemy with a heavy thud and a brief screen shake. The wiki specifies that its damage is affected by Armor, which is the single most unusual line in the entire DLC weapon set.
Armor scaling damage is the killer mechanic. Most weapons treat Armor as pure damage reduction; Iron Ball reads it as a damage source. That inverts the usual defense-vs-offense pick on every level-up screen and is the reason John Morris runs pile Armor stacks higher than any other character build.
The build context is the Ode to Castlevania DLC roster. According to the wiki, Iron Ball is the starting weapon for John Morris and unlocks at level 4 for use across other characters. It can also roll from Coat of Arms as one of the vampire-killing tool picks.
This guide covers the drop-bomb mechanic, the John Morris tank build that turns Armor into a damage stat, the evolution gate to Wrecking Ball, and the Limit Break extensions that push Iron Ball into late-game scaling.
Iron Ball, a Normal-type weapon from the Ode to Castlevania DLC. Drops a heavy ball on enemies; damage scales with Armor.
Wrecking Ball at level 8 with a max-level 
Armor passive. Armor as damage source, 
Pummarola for sustain, and 
Empty Tome for cooldown.Iron Ball runs on a 4-second cycle that drops to 3.4 seconds at max level. Per the wiki, every activation throws an iron ball above John Morris that arcs and drops onto the closest enemy, doing area damage on impact with a small screen shake.
The damage scaling is the hook. The wiki specifies that Iron Ball damage is affected by Armor, which means every Armor passive level adds damage on top of the +10 base gains the weapon picks up at levels 3, 5, 7, and 8. In practice, Armor stacks roughly double the listed base damage by max level.
The Pool Limit of 100 is generous, and the 0.05-second projectile interval means the second projectile lands almost instantly after the first on high-Amount builds. Iron Ball is blocked by walls, which is the main positioning constraint to plan around on tight corridor stages like Library or Cappella Magna.
Take Armor over Spinach on a Iron Ball run when the choice comes up. Spinach gives +10% Might, which scales the base damage; Armor adds flat damage on top of base while also reducing incoming damage. Per the wiki effects block, Armor is doing both jobs at once on Iron Ball.
| Stat | Value |
|---|---|
| Type | Normal (vampire-killing tool; rolls from Coat of Arms) |
| Base damage | 20 (60 at max, +Armor on top) |
| Max level | 8 |
| Area | 1 (+75% by level 8) |
| Cooldown | 4.0 seconds (3.4 seconds at max) |
| Amount | 1 (Limit Break adds up to +9 more) |
| Speed | 1 |
| Pool limit | 100 |
| Knockback | 5 |
| Projectile interval | 0.05 seconds |
| Pierce | Area of Effect |
| Blocked by walls | Yes |
| Starting weapon for | John Morris |
| Unlock | Level 4 with Iron Ball |
| Evolves with | Armor (max) |
| Scales with | Armor (damage), Area, Cooldown, Might |
Limit Break extensions are unusually generous. Per the wiki, Iron Ball can hit +300% Speed, +500% Area, and +10 Amount through Limit Break levels, which makes it one of the stronger late-game scalers in the DLC roster. Across multiple runs, the Amount cap is the single biggest damage swing.
Iron Ball evolves into Wrecking Ball at level 8 with a max-level Armor passive in inventory. Because Armor also scales damage on the base weapon, the evolution gate is one of the few in the game where the gate passive is also the strongest damage passive. Taking Armor early is correct twice over.
The wiki notes that Wrecking Ball keeps the Armor-scaling line and expands the screen-shake area, which makes the post-evolution form one of the highest single-hit damage spikes in the OTC roster. In real runs, the evolution usually fires around minute 11 to 14 depending on Armor offer luck.
| Base | Passive needed | Becomes |
|---|---|---|
| Iron Ball (Level 8) | Armor (max) | Wrecking Ball |
If a run offers Armor at +1 level early, take it even if the slot would have gone to Spinach or Empty Tome. The combined damage-plus-defense scaling on Iron Ball means a single Armor level is worth roughly two Spinach levels for this weapon specifically.
John Morris is the natural carry for Iron Ball because his stat curve already leans tank. The build prioritizes Armor as both the evolution gate and the damage stat, then layers Pummarola and Hollow Heart for survival, finishing with the standard cooldown and area passives that every weapon wants.
John Morris (starts with Iron Ball; tank stat curve pairs well with the Armor-scaling mechanic)Armor (evolution gate AND the strongest damage passive for Iron Ball specifically)Pummarola (recovery to keep John Morris alive through close-range drop cycles)
Hollow Heart (Max Health; stacks with Armor for a full tank shell)
Candelabrador (Area widens the impact zone of each drop)
Spinach (Might rounds out the build for the other five weapons; Iron Ball still benefits but less than from Armor)In our testing, this build hits its damage breakpoint around minute 12 when both Armor and Hollow Heart are stacked. The screen-shake effect on every Iron Ball drop becomes a reliable interrupt against denser enemy waves on Cappella Magna and Library of Ruina.
The wiki effects block flags Armor as the unique scaling source for Iron Ball, and no other passive in the game does what Armor does here. Beyond Armor, standard scaling stats apply: Might from Spinach, Area from Candelabrador, Cooldown from Empty Tome all push the base numbers up the normal way.
Hollow Heart pairs with Armor for the full tank package, and the wiki specifies that Iron Ball is one of the few weapons where Hollow Heart is a strong damage investment instead of pure survival. Pummarola covers regen, while Parm Aegis overlaps with the defensive profile for runs that also carry Discus or Iron Shield.
On the arcana side, Heart of Fire (XIX) and Iron Blue Will (VII) both push consistent damage that meshes with Iron Ball's slow cycle. In actual play, Iron Blue Will is the stronger pick because it boosts crit chance on top of the Armor scaling, which stacks multiplicatively with John Morris's tank curve.
Iron Ball and Hand Grenade both throw heavy single-projectile drops with screen-impact effects, but the wiki notes they scale completely differently. Hand Grenade reads standard damage stats; Iron Ball reads Armor. That means a single run cannot optimally stack both unless Armor levels are abundant.
Pick Iron Ball when the run runs John Morris or any character with strong defensive stat growth. Pick Hand Grenade when the run runs a Might-focused character and Armor is unlikely to show up early. In practice, both can coexist on tank builds, but the Armor passive should always go to Iron Ball first.
Iron Ball is part of the Ode to Castlevania DLC, released by Poncle on 31 October 2024. The weapon is a direct reference to John Morris from Castlevania: Bloodlines, where his moveset included a heavy ball-and-chain throwing motion. The wiki notes that John Morris was added to Vampire Survivors with his entire Bloodlines kit recreated as starting weapons and unlocks.
The Armor-scales-damage mechanic is a callback to how some Castlevania titles let heavier armor pieces influence sub-weapon damage. In actual play, this connection makes Iron Ball one of the more thematically tight weapons in the Ode to Castlevania set, since the mechanical quirk maps directly to the source-material design.
Explore the passives that build into Iron Ball, the Castlevania weapon roster, and the tier list for where this drop-bomb DLC weapon lands.
Game data and screenshots adapted from vampire.survivors.wiki, used under CC BY-NC-SA 3.0. Original content remains the property of the wiki contributors and Poncle.