Last Z Gacha Go Event Guide — Golden Wrenches Strategy
Quick Answer
Gacha Go strategy:
- Gacha Go event = wrenches · essential for vehicle mods
- Save 300 keys · buy 70 wrenches at best rate
- ~410 diamonds per wrench · (based on player data) — vs 300 in VIP shop
- Keys carry over · save between Gacha Go events
Goal: 10,000+ wrenches for max vehicle level.
What is Gacha Go?
Gacha Go is a recurring diamond-spending event that rewards Golden Wrenches, Modification Blueprints, and gift boxes. Golden Wrenches are essential for vehicle modification and unlocking powerful vehicles like Hercules.
Why Golden Wrenches matter: You need 10,000+ Golden Wrenches for max vehicle level. This event is the fastest way to collect them.
Gacha Go Event Timing / Schedule
Gacha Go typically appears in a weekly hot-event rotation alongside Bullseye, Lucky Discounter, and Lucky Chest. Use the common order Gacha Go → Bullseye → Lucky Discounter → Lucky Chest as your planning baseline, then confirm the current week in the in-game events list. citeturn1reddit13turn1reddit14turn1reddit15
Planning tip: Start saving keys and diamonds at least one week before the expected Gacha Go week so you can hit the 300-key exchange tier.
How Gacha Go Works
- Cost per draw: 500 diamonds for 1 draw, or 5 draws at a time
- Rewards: Gift boxes, keys, Golden Wrenches, Modification Blueprints, speedups
- Points system: Every draw earns points toward milestone rewards
- Storage: Limited space for gift boxes — delete unwanted items to continue
- Keys carry over: Unused keys transfer to the next Gacha Go event
Key Exchange Rates
Keys can be exchanged for Golden Wrenches at these rates. For another great diamond-spending event, see our Lucky Discounter guide:
| Keys Required | Golden Wrenches | Efficiency |
|---|---|---|
| 10 keys | 2 wrenches | 5 keys per wrench (worst) |
| 60 keys | 12 wrenches | 5 keys per wrench |
| 300 keys | 70 wrenches | 4.3 keys per wrench (best) |
Strategy: Always save for the 300-key bundle. It gives significantly better value than smaller purchases.
Diamond Efficiency Analysis
Real spending data from 55,000 diamonds:
- Diamonds spent: 55,000
- Golden Wrenches obtained: 134
- Cost per wrench: ~410 diamonds
- VIP shop price: 300 diamonds (10 wrenches for 3,000)
- Value: Bulk wrenches + bonus milestone rewards
Important: Gacha Go is luck-based. The main advantage is bulk accumulation (VIP shop only allows 10 wrenches/week), plus you get bonus rewards from point milestones.
Point Milestones
As you spend diamonds, you earn points toward milestone rewards:
- 5,000 points: Golden Wrenches + bonus items
- 8,000 points: 15 Golden Wrenches + Modification Blueprint + Gift Voucher
- Higher tiers: Additional Golden Wrenches and rare items
The Gift Voucher from 8,000 points can be used in future events — don't skip this milestone if you're close.
Optimal Strategy
1. Set Your Budget
Decide how many diamonds you'll spend before starting. A good target is 30,000-55,000 diamonds to accumulate enough keys for the 300-key bundle.
2. Focus on Keys
Your primary goal is accumulating keys. Gift boxes and other items are secondary. Delete speedups and unwanted items to make storage space.
3. Save Keys for Bulk Purchase
Don't spend keys on small bundles. Wait until you have 300 keys, then buy the 70 Golden Wrench bundle for maximum efficiency.
4. Skip Animation
Use the skip animation option to speed up draws. Some players report better key drops with animation skipped (unconfirmed).
5. Carry Over If Needed
If you don't reach 300 keys, save them for the next Gacha Go event. Keys don't expire between events.
Storage Management
When storage is full, you have options:
- Delete items: Remove speedups and items you don't need
- Continue drawing: You'll only receive keys (no boxes) when full
- Open boxes: Claim rewards to free up space
Tip: Delete items you can't afford to buy anyway. Focus on accumulating keys first.
Gacha Go vs VIP Shop
| Method | Cost per Wrench | Pros | Cons |
|---|---|---|---|
| Gacha Go | ~410 diamonds | Bulk farming, bonus rewards, keys carry over | Luck-based, time-limited event |
| VIP Shop | 300 diamonds | Guaranteed, always available | Limited to 10/week, slow accumulation |
Verdict: Use both. Buy VIP shop wrenches monthly, but use Gacha Go for bulk farming when you need to progress quickly. For other ways to boost your power, check our Power Guide.
Why Rush Golden Wrenches?
Vehicle modification requires massive amounts of Golden Wrenches:
- Max vehicle level: 10,000+ Golden Wrenches total
- VIP shop pace: Only 10 wrenches/week = slow accumulation
If you want to progress vehicle mods in a reasonable timeframe, Gacha Go is essential. Waiting for VIP shop alone would take too long.
FAQ
Is there a daily limit on keys from Gacha Go?
Some rewards have soft daily limits, but keys can be accumulated continuously. The exact mechanics aren't fully documented.
Should I buy the 60-key bundle or save for 300 in the Gacha Go event?
Always save for 300 if possible. The efficiency difference (4.3 vs 5 keys per wrench) adds up significantly over time.
What about Modification Blueprints in Gacha Go?
Blueprints are a bonus, not the main goal. Focus on Golden Wrenches first — you'll get enough blueprints naturally from the event.
When does the Gacha Go event appear in Last Z?
It typically appears in the weekly hot-event rotation alongside Bullseye, Lucky Discounter, and Lucky Chest. Plan around the order: Gacha Go → Bullseye → Lucky Discounter → Lucky Chest.
What is the Gacha Go schedule?
The common reported weekly order is Gacha Go, then Bullseye, then Lucky Discounter, then Lucky Chest.
Game mechanics and numbers may change with updates. This guide was last validated in January 2026.