The First Descendant: ETA-0 Guide | Best Items to Buy (October Rotations)

After the recent huge update on October 10, where The First Descendant welcomes its latest Ultimate character, Ultimate Freyna, Nexon also deploys another update that can help the players earn and trade in their duplicates for rare items in the form of a vendor system, ETA-0. This guide will highlight the functions of ETA-0 in the First Descendant, and take a look at the wares it provides to the players for October. Let’s begin.

Nexon released The First Descendant on July 2, 2024, on PC, PlayStation 5, and Xbox Series X|S, and recently launched the Season 1 Invasion Update Part 2 on October 10, 2024.

If you are looking for more guides and content on The First Descendant, then you can read them here on KeenGamer through the links below:

• How to Enter The First Descendant’s Freyna’s Encrypted Vault Shop Event
• How to Clear the Invasion Dungeons in The First Descendant
• The First Descendant | Ranking the Ultimate Descendants from Best to Worst
• The First Descendant | How to Beat the Frost Walker Void Intercept Boss
• The First Descendant | How to Beat the Dead Bride Void Intercept Boss
• The Best Starting Character to Pick in The First Descendant

This guide will receive regular updates to accommodate The First Descendant‘s ETA-0 October weekly rotations. Last Update: October 27, 2024.

What is ETA-0 in The First Descendant?

To accommodate the players’ needs to get rid of their duplicate and unnecessary blueprints, Nexon introduces ETA-0 to The First Descendant. This new in-game vendor system allows one to sell unwanted items and exchange them with blueprints or consumables of the players’ desires. 

This new vendor system uses two new currencies: Premium ETA Vouchers and Standard ETA Vouchers. Standard ETA Vouchers are obtainable through the new 400% Infiltration Missions, which are accessible during the Invasion Dungeons’ daily rotation. Each mission yields around 8-9 Standard ETA Vouchers, and you can repeat the missions ad infinitum until the next day’s rotation comes around. To use the Standard ETA Vouchers, simply go to ETA-0 and open the ‘Exchange Infiltration Operation Reward’ to see what items you can buy after the hard-fought battles.

Another currency in ETA-0 is the Premium ETA Vouchers, which is obtainable by selling your duplicate blueprints through ETA-0’s ‘Sell Blueprints’ system, in which the vendor gives you 3 to 15 Premium ETA Vouchers for each blueprint, depending on their drop rate rarities. For example, Ultimate Bunny Code, which has a 6% drop chance, will net you 15 Premium ETA Vouchers. Meanwhile, the King’s Guard Lance Blueprint will only net you 3 Premium ETA Vouchers, as this blueprint has a 32% drop chance. To use the Premium ETA Vouchers, you can head to the ‘Exchange Supplies’ section to see the wares the vendor has for you.

ETA-0 Vendor.

ETA-0 First October Rotation’s Must-Buy Items (October 11-13)

For the previous selection on ETA-0, The First Descendant gives its players the chance to grab some amazing rewards through this vendor system. The first October rotation, which happened from October 11 to 13, provides some juicy items to trade in for your Vouchers. Here are the items that you should go for in this week’s rotation:

1. Energy Activator Blueprint: The Energy Activator Blueprint is one of the rarest items in The First Descendant, as it only has a 6% drop chance from the Amorphous Material Patterns. Luckily, this week ETA-0 provides the players with one of them, and you can buy it at a good price of 15 Standard ETA Vouchers, which you can obtain after running through two 400% Infiltration Missions.
2. Descendant Slots +1: The next item that you should aim for is the Descendant Slots +1, which is available in the Exchange Supplies section. Although it is pricey, costing you 60 Premium ETA Vouchers, having an additional Descendant Slot without spending Calibers is massive, as you can spend that Calibers elsewhere. 
3. Equipment Slots + 2: Another item that you can purchase from ETA-0’s current rotation is the Equipment Slots +2, which will cost you 60 Standard ETA Vouchers. The reason for this is that having additional Equipment Slots is always handy since you might not have enough to accommodate every Descendant you have. Also, having two bonus Equipment Slots without purchasing them with Calibers is massive. Consider buying it before the current ETA-0 rotation ends.

ETA-0 Second October Rotation’s Must-Buy Items (October 18-20)

For the previous selection on ETA-0, The First Descendant gives its players the chance to grab some amazing rewards through this vendor system. The second October rotation, which happened from October 18 to 20, provides some juicy items to trade in for your Vouchers. Here are the items that you should go for in this week’s rotation:

1. Storage Slots +2: The first item that you can aim for is Storage Slots +2. This will cost you 60 Standard ETA Vouchers, so make sure that you have done several 400% Infiltration Missions before buying it. The reason why this item is valuable is because outside of ETA-0, you need to spend Calibers to increase the Storage Slots, so having additional slots without spending real money is always welcomed.
2. Code Breakers: The next item that you should aim for is the Code Breakers, which are available in the Supplies section for the Ultra-Precision Code Breakers (15 Premium ETA Vouchers), while the Precision Code Breakers (15 Standard ETA Vouchers) and Code Breakers (15 Standard ETA Vouchers) are available in the Exchange Rewards section. The reason for picking these items is that the drop rates for Code Breakers are very low, even with the help of a Drop Rate booster from your External Components.
3. Equipment Slots + 2: Another item that you can purchase from ETA-0’s current rotation is the Equipment Slots +2, which will cost you 60 Premium ETA Vouchers. The reason for this is that having additional Equipment Slots is always handy since you might not have enough to accommodate every Descendant you have. Also, having two bonus Equipment Slots without purchasing them with Calibers is massive. Consider buying it before the current ETA-0 rotation ends.

ETA-0 Third October Rotation’s Must-Buy Items (October 26-28)

For the current selection on ETA-0, The First Descendant gives its players the chance to grab some amazing rewards through this vendor system. The second October rotation, which is currently happening from October 26 to 28, provides some juicy items to trade in for your Vouchers. Here are the items that you should go for in this week’s rotation:

1. Storage Slots +2: The first item that you can aim for is Storage Slots +2. This will cost you 60 Premium ETA Vouchers, so make sure that you have done several 400% Infiltration Missions before buying it. The reason why this item is valuable is because outside of ETA-0, you need to spend Calibers to increase the Storage Slots, so having additional slots without spending real money is always welcomed.
2. Code Breakers: The next item that you should aim for is the Code Breakers, which are available in the Supplies section for the Ultra-Precision Code Breakers (15 Premium ETA Vouchers), while the Precision Code Breakers (15 Standard ETA Vouchers) and Code Breakers (15 Standard ETA Vouchers) are available in the Exchange Rewards section. The reason for picking these items is that the drop rates for Code Breakers are very low, even with the help of a Drop Rate booster from your External Components.
3. Equipment Slots + 2: Another item that you can purchase from ETA-0’s current rotation is the Equipment Slots +2, which will cost you 60 Premium ETA Vouchers. The reason for this is that having additional Equipment Slots is always handy since you might not have enough to accommodate every Descendant you have. Also, having two bonus Equipment Slots without purchasing them with Calibers is massive. Consider buying it before the current ETA-0 rotation ends.

And that’s everything you need to know about ETA-0’s October rotations on The First Descendant.