Cast a Magnet Mutations Tier List

This Mutations Tier List ranks the mutation vials and tagged pulls that Cast a Magnet players chase after the basic cast → sell → upgrade loop is stable. Sweg Magnets’ Roblox incremental advertises luck-driven rares and base displays; community autofarm and merchant listings consistently name Sandy, Charged, Phased, Gold, Rainbow, and Diamond mutation potions as the consumable layer that turns a normal bag into index and showcase progress. Treat every row as community guidance for a young game — exact sell multipliers can shift after 🚨UPD banners — and cross-check live tooltips plus item values.

Deep system notes live in mutations and weather. Magnet spend order stays on magnets. Rarity bands without mutation tags stay on items and rarity.

Ranking key

Tier	Meaning for mutations
S	Always protect first copies; display + index priority
A	Strong keep; sell only true duplicates after credit
B	Situational keep during weather or bounty needs
C	Fine flex; safe to sell when Cash gates block upgrades

We rank for collection value and regret cost, not for memes alone. A mutation that looks loud but gets sold by every autofarm filter is still a keep if it fills a unique index row.

S-tier — protect without debate

Rainbow Mutation

Rainbow-tagged pulls are the classic showcase layer in community talk. First copies belong on a display base stand before any Sell All. Pair Rainbow vials with a live luck window and clean perfect cast timing so the timer is not wasted on failed reels.

Diamond Mutation

Diamond sits beside Rainbow as a premium flex / index target. If merchant stock offers a Diamond vial during weather you already planned to farm, it is worth the Cash only when power and rope are not starving. Never buy Diamond stock to fund a panic sell of your only Diamond pull later.

A-tier — keep first, sell duplicates later

Gold Mutation

Gold mutations read as high-value mid-premium tags: great for display walls and for teaching new players that not every shiny should hit Sell All. Keep the first Gold of each item family; liquidate extras when a Real Power or Rope Length breakpoint is one bag away.

Charged Mutation

Charged vials show up repeatedly in mid-November 2026 script merchant lists next to luck potions. Charged pulls are strong keepers for index holes and bounty objectives that ask for “special” tags. Sell duplicates after the log credits them.

B-tier — weather and bounty dependent

Phased Mutation

Phased is a specialist tag: valuable when an index row or bounty calls for it, less critical as raw Cash. Pop Phased vials when weather already favors rare rolls, or skip them during pure Cash farming sessions.

Sandy Mutation

Sandy Mutation Potion is one of the most frequently named consumables in Alexandria / Plak style feature lists. That visibility makes it easy to overbuy. Treat Sandy as B-tier priority: excellent for filling sandy/index variants and for learning mutation discipline, but not worth emptying Cash below your next upgrade floor. Keep first Sandy copies; sell duplicates freely once credited.

C-tier — flex filler

Untagged “almost mutated” cosmetics, failed vial sessions that only produced slightly tinted commons, and duplicate low-interest variants fall here. If the bag is full and a rope rank is affordable, sell. Your future self will thank you for the upgrade more than for a second identical common with a weak tint.

Vial shopping order (merchant)

When the merchant shows multiple mutation SKUs:

1. Confirm you are in a hunt session, not a Cash grind.
2. Protect upgrade Cash for Real Power / Rope Length first.
3. Buy the vial that matches your largest index hole (Rainbow/Diamond gaps before vanity Sandy duplicates).
4. Add a 2x or 4x Luck Potion only if timing and weather support a full timer.
5. Stop after one focused block — chaining every vial in inventory is how Cash farms die.

Free community Luck Potions (join the official Roblox group linked from the game page) should be banked before you buy paid luck SKUs. Mutation vials are separate: they tag variants; luck potions raise roll quality.

Weather synergy

Mutation vials print more value when weather or event banners already shift loot tables. Practical rule from the mutations and weather guide: pop the vial that matches the missing variant, then the luck potion, after upgrades and cast timing are ready. Skip stacking every vial you own into one tired session.

Autofarm filters vs this tier list

If you read educational hubs like Alexandria or Plak, configure Auto Sell / Keep Favorite / Protect so S and A mutations never dump. Blind “sell all rarities below X” filters are how Diamond firsts disappear overnight. Manual players should favorite the same tags before every Sell All.

How this list will change

Cast a Magnet launched 9 October 2026 and still ships frequent UPD title tags. When Sweg Magnets retunes vial prices, mutation rates, or display rewards:

• Re-read patch notes
• Retest one manual hunt before trusting old merchant muscle memory
• Adjust script filters on alts only if you automate at all

We will move rows when community evidence shows a clear value shift — not when a single Discord screenshot claims a new “god tier.”

Related pages

• Mutations and Weather — full vial list and weather timing
• Luck and Potions — permanent Luck vs 2x/4x timers
• Items and Rarity — non-mutated rarity ladder
• Cash Farming — when to ignore vials entirely
• Display Base — where S-tier pulls live
• Tier List Hub — magnets + items overview

Protect S-tier mutations, fill A-tier index holes on purpose, and treat Sandy/Phased as tools — not mandatory purchases on every merchant refresh. That is how Cast a Magnet players build a base wall worth visiting.