Throw a Coin Update 3: Mutation Machine and New Loot

Throw a Coin Update 3 launched on July 18, 2026 and is the largest content update in the game's history. The headline feature is the Mutation Machine, which is a new building that allows players to convert base items into mutation variants by spending cash and a catalyst item. The update also added the X2 Sell All pass, a new cosmetic unlock for Mutation Machine users, and a balance pass on the late-game coin tiers. The Roblox incremental simulator built by The BEST group yet! has not had a content update of this scale since launch, and the Mutation Machine is the single biggest addition to the game since the Index was introduced in the original May 6, 2026 release.

This page covers every change in Update 3 in detail, with the new building explained, the mutation tiers listed, the new upgrade covered, and the balance changes documented. The wiki treats this as the canonical reference for Update 3 content.

The Mutation Machine

The Mutation Machine is a new building in World 2 that is unlocked after purchasing the Fire Coin and reaching the Epic tier. The machine sits in a dedicated plot in the World 2 hub, and it accepts three inputs: a base item, a catalyst item, and a cash payment. The machine consumes the base item and the catalyst, deducts the cash, and produces a mutation variant of the base item based on a random roll.

The mutation tier you can produce depends on the rarity of the base item and the rarity of the catalyst. A Common base item with a Common catalyst can only produce Big or Huge mutations. A Legendary base item with a Legendary catalyst can produce Astral or Divine mutations. The full input table is listed below in the mutation tier section.

The base principles of how the machine works are:

• The base item and the catalyst must be from the same item category for the roll to start.

• The cash payment scales with the mutation tier and is non-refundable on a failed roll.

• A failed roll consumes both inputs and returns the same base item with no mutation.

• The success rate is fixed per mutation tier and does not change with player level or server.

• The machine is the only system in the game that can produce a Divine mutation, so it is a required end-game build.

How the Machine Works

The machine has a 5-second channel time during which the animation plays and the roll is calculated. If the roll succeeds, the base item is converted to the mutation variant. If the roll fails, the base item and the catalyst are both consumed and no mutation is produced. The success rate scales with the mutation tier, with Big being the most reliable and Divine being the rarest.

The machine is a hard RNG system, meaning the outcome is determined at the moment the roll is calculated, not at the moment the machine is activated. This is an important detail for players who are trying to optimise their mutation runs, because the success or failure is not affected by the time spent in the machine or the order in which the inputs are entered. The only factors that matter are the rarity of the inputs and the mutation tier being attempted.

The Five Mutation Tiers

The machine produces five mutation tiers, each with its own success rate, cash cost, and minimum input rarity. The tiers are listed in the table below in the order they were introduced in the game, from the lowest (Big) to the highest (Divine).

The success rates in the table are the post-Hotfix 3.0.1 values. Before the hotfix, Astral was at ~20% and Divine was at ~10%, but the hotfix reduced both to bring them in line with the community-observed drop rates. The hotfix also increased the Rainbow cash cost from ~1,500 to ~2,500.

Mutation Tier Effects

Each mutation tier applies a visual effect to the item and a value multiplier to the item's sell price. The visual effect is a coloured glow that follows the item in the inventory and in the world. The value multiplier scales with the mutation tier, with Big being the smallest multiplier and Divine being the largest.

The value multipliers are important for the cash flow, because the mutated items are worth significantly more than the base items. A Divine mutation of a Legendary item is worth around 30x the base value, which is enough to make a single successful run a meaningful cash boost.

The X2 Sell All Pass

The X2 Sell All pass is a new upgrade added in Update 3 that doubles the cash value of the Sell All function. The pass costs a one-time fee of 1,000,000 coins and is a permanent unlock for the save. The pass stacks with the existing Sell All upgrade, so a player who has both the upgrade and the pass gets 2x the base sell value for all items sold via Sell All.

The pass is most useful in the late game, when the player has a large inventory of mutated items to sell. A late-game player with a full inventory of Divine Legendary items can sell the entire inventory for tens of millions of coins via Sell All with the pass, which is a meaningful cash boost toward the next coin tier.

New Cosmetic Unlocks

Update 3 added two new cosmetic effects for Mutation Machine users. The first is a special cursor trail that follows the player's cursor in the game, and the second is an aura effect that surrounds the player's avatar. Both effects are unlocked by hitting certain mutation thresholds.

The trail effects are visible to other players in the same server, so a player with 500 successful mutations is recognisable by the rainbow trail. The wiki has observed that the trails are a status symbol in the community, and players often ask in chat which trail comes from which threshold.

Aura Effects

In addition to the trails, Update 3 also added five aura effects that are unlocked at the same thresholds as the trails. The auras are soft glows that surround the player's avatar, and the colour of the aura matches the colour of the trail. The auras stack, so a player with all five trails unlocked shows all five auras simultaneously.

The auras are subtle in the early game but become very visible in the late game, especially when surrounded by other players in the World 3 hub. The wiki treats the rainbow aura as the most prestigious visual unlock in the game, and reaching 500 successful mutations is a long-term goal for most players.

Balance Changes in Update 3

Update 3 also included a balance pass on the late-game coin tiers. The pass reduced the cash cost of the Eclipse Coin, the Mirage Coin, and the Obsidian Coin by 10% each, and it increased the cash output of the Astral mutation by 5%. The pass was intended to make the late-game progression smoother, especially for players who were close to the World 2 → World 3 transition.

The balance pass was a small change in absolute terms, but it was meaningful for players who were close to the next coin tier. The pass also made the Astral mutation a more attractive option for cash flow, because the 5% output boost stacks with the existing Astral value multiplier.

The Hotfix 3.0.1 Rebalance

Hotfix 3.0.1, released three days after Update 3 on July 21, 2026, made three additional balance changes. The hotfix reduced the Astral success rate from ~20% to ~15%, the Divine success rate from ~10% to ~5%, and increased the Rainbow cash cost from ~1,500 to ~2,500. The hotfix was a response to community feedback that the Astral and Divine mutations were too easy to produce, and that the Rainbow mutation was too cheap.

The hotfix was a small but meaningful balance change, and it was the only follow-up to Update 3 before the World 3 launch on July 26, 2026.

Frequently Asked Questions

What is the Mutation Machine?

The Mutation Machine is a new building in World 2 that converts base items into mutation variants. The machine accepts a base item, a catalyst item, and a cash payment, and produces a mutation variant based on a random roll.

What is the best mutation tier to farm?

The Big mutation tier is the most efficient, because the success rate is the highest (~30%) and the cost is the lowest (~100 coins). The recommended strategy is to fill the Big sub-entries first, then the Huge sub-entries, then the higher tiers in order.

Is the X2 Sell All pass worth 1,000,000 coins?

Yes, the pass is a permanent unlock that doubles the Sell All cash value on every item sold through that function. The pass pays for itself after a few hundred Divine Legendary items are sold via Sell All, which most late-game players reach within a few weeks.

How do I unlock the Mutation Machine?

The machine is unlocked after purchasing the Fire Coin and reaching the Epic tier on the coin ladder. The machine sits in a dedicated plot in the World 2 hub next to the upgrade stations and the Auto Throw building.

What was the biggest change in Hotfix 3.0.1?

The biggest change was the reduction in Astral and Divine success rates by 5 percentage points each, which made the higher tiers meaningfully rarer. The hotfix brought the success rates in line with the community-observed drop rates and made the tiers feel more rewarding.