Final Fates Tower Defense Codes [Frieren Guide: What the Codes Actually Give You (And Why Most Players Waste Them)

What the Codes Actually Give You (And Why Most Players Waste Them)

Codes in Final Fates Tower Defense hand out two things: Crystals for summoning and Trait Shards for rerolling unit traits. The common assumption is that you should burn codes immediately for more pulls. That assumption costs you progression. Trait Shards become scarce far faster than Crystals once you've cleared the early story milestones, and a bad trait on a strong unit permanently caps its damage output. The Frieren update codes—Frieren, Update2, RengokuEvo, SorryForTheWait—are currently active alongside a stack of older codes, but redeeming them without a plan is like getting a paycheck and spending it at random.

Here's the decision: hold your Trait Shards until you have a unit worth keeping, and spend your initial Crystals on expanding your deployment limit before chasing rare units.

First-Hour Priorities: What the Tutorial Skips

The tutorial teaches placement and upgrading. It does not teach you that your deployment limit matters more than your unit rarity for the first fifteen waves. Each unit on the field costs deployment capacity, and early-game capacity is painfully tight. You can have a mythical-tier unit and still lose wave 8 because you can't field enough bodies to cover multiple lanes.

Your first Crystals should go to the shop's deployment limit upgrades, not summons. Two extra slots turns a struggling three-unit formation into a five-unit formation with coverage flexibility. The math is straightforward: five level-20 common units outdamage two level-40 rare units in most early maps because of path coverage and target prioritization splits.

The tutorial also under-explains trait scaling. Units have base stats, but traits multiply those stats. A "Strong" trait might give +15% damage while "Godly" gives substantially more. The gap widens with upgrades because the multiplier applies to the upgraded base. A unit with a poor trait will always lag, no matter how much you invest in levels. This is why Trait Shards are the long-term bottleneck. Crystals flow from daily rewards, AFK farming, and map clears. Trait Shards do not.

First-hour action sequence:

• Redeem all active codes immediately (they expire without warning; the source shows codes from previous updates are already inactive)
• Spend Crystals on deployment limit until you hit 5-6 slots
• Run the first story maps with your starter units; don't reroll traits yet
• Save every Trait Shard until you pull a unit from the Frieren banner or get a confirmed S-tier from the standard pool

The Frieren update specifically added units with mage-class damage profiles—typically high range, lower fire rate, strong against grouped enemies. If your early pulls include Frieren-class units, prioritize them for trait investment over physical attackers. Map design in recent updates has trended toward clustered wave spawns that punish single-target focus.

Mechanics That Waste Your Time and Currency

The "summon until shiny" trap. New players see the rarity colors and assume higher is always better. Epic and legendary units have higher base stats but also higher upgrade costs and deployment requirements. A fully upgraded rare unit costs less total gold per damage point than a partially upgraded legendary. Early game gold income is fixed per wave. You cannot afford to max a legendary in the first twenty waves. You can afford to max two rares.

The AFK farming misconception. Leaving the game running in "Infinite Mode" generates gold and crystals, but the returns scale with your highest cleared story chapter. Farming chapter 3 infinite mode for three hours yields less than farming chapter 7 for one hour. Push story progression before you AFK. The game does not explain this scaling coefficient anywhere in the interface.

The friend unit oversight. You can borrow one unit from a friend per map. Most players ignore this. A friend's maxed unit with a Godly trait can solo early waves, letting you invest your gold in economy buildings or save for later waves. The borrowed unit doesn't earn experience for your collection, but it does let you clear maps above your power level to unlock better farming zones.

Trait reroll timing. The game lets you reroll traits at any time. The hidden cost is that rerolling a level 1 unit costs the same as rerolling a level 50 unit, but the level 50 unit has already consumed irreversible gold and experience. Reroll immediately upon obtaining a unit you plan to keep. If you get a unit with "Weak" or "Broken" traits, bench it until you have shards to fix it—don't level it hoping the trait will matter less. It matters more.

Decision	Short-Term Feel	Long-Term Cost
Reroll traits immediately on new S-tier	Wasteful, shards feel precious	Saves thousands in gold/XP on bad investments
Max first legendary pull	Powerful, satisfying	Gold starvation for rest of formation, slower clear times
AFK farm before pushing story	Easy, passive	Hours of suboptimal returns, delayed progression
Ignore friend units	Self-reliant	Missed chapter clears, locked farming zones

The Next Three Decisions That Shape Your Run

Decision 1: Which Frieren banner unit to build around?

The update added multiple units, but not all share the same role. Mage-class units in this game typically have ability cooldowns that scale with attack speed upgrades differently than physical units. If you pull Frieren herself (the namesake unit), her ability hits in a line—strong on linear maps, weak on circular or branching paths. Check the map pool for your current story chapter before committing shards. A line-ability unit in a circular map performs at roughly 60% efficiency compared to an area-of-effect alternative. This is the kind of mismatch that makes players think their unit is "bad" when it's actually misplaced.

Decision 2: When to stop story pushing and farm?

There's a breakpoint around chapter 6-8 where enemy health scaling outpaces your natural gold income. You'll know you've hit it when wave 10 enemies survive your full formation's burst. At this point, backtrack to the highest chapter you can full-clear with zero leaks, then run it on double-speed with auto-skip enabled. The efficiency metric is "gold per minute including load times," not "highest chapter partially cleared." Most players overpush by 2-3 chapters and waste time on slow, partial clears.

Decision 3: Trait Shard allocation between main DPS and support units

Support units—healers, gold generators, slow effects—often get ignored for trait investment. But "Swift" or "Range+" traits on a gold generator mean it activates more frequently or covers more of the map, compounding your economy. A single support unit with a Godly economy trait can outvalue a DPS upgrade by wave 15 because of the gold snowball. The trade-off: shards spent on support are shards not spent on your carry. Early on, put your first Godly-tier trait on your highest-damage unit. Once you have a stable farmer, shift 20-30% of shard income to key supports.

The asymmetry here is sharp. A Godly DPS unit clears maps faster. A Godly support unit lets you clear maps you shouldn't be able to clear yet. If you're stuck, try the support route before grinding levels.

What to Do Differently

Stop treating codes as a lottery ticket to be cashed immediately. They're a resource reserve for a specific bottleneck. Redeem them for the Crystals and shards, spend the Crystals on deployment limit and selective banner pulls, then sit on your Trait Shards until you have a unit whose base kit you understand well enough to know which trait actually helps it. "Godly" damage on a support unit is a waste. "Swift" on a slow-hitting mage is often a trap. The codes give you options; they don't remove the need to think.