Last Z Gacha Go Guide — Golden Wrench Strategy, Keys, and Hercules Path

What Is Gacha Go in Last Z?

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 and 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.

Planning tip: Start saving keys and diamonds at least one week before the expected Gacha Go week to build toward the 500-key wrench gift.

For the wider event calendar and rotation planning, use the Events Schedule.

How Gacha Go Works

• Cost per draw: 100 diamonds for 1 draw, or 500 diamonds for 5 draws
• Rewards: Gift boxes, keys, Golden Wrenches, Modification Blueprints, speedups
• Points system: Every draw earns points toward milestone rewards
• Storage: Four gift slots. Draws continue when full, but no new gifts appear
• Keys carry over: Unused keys transfer to the next Gacha Go event; unopened gifts disappear

Best Key Strategy and Exchange Rates

Use keys to open a matching gift in storage at these rates. For another great diamond-spending event, see our Lucky Discounter guide:

Strategy: Prefer the 500-key gift: it costs about 2.8% fewer keys per wrench than the 300-key gift. Use the 300-key gift if you need wrenches sooner. You can open either more than once in the same event when you obtain another matching gift and have enough keys.

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 Gacha Go Strategy

1. Set Your Budget

Plan a 30,000–55,000-diamond budget for Gacha Go, keeping your shield reserve separate.

2. Focus on Keys

Keep drawing to accumulate keys. Free a gift slot only when you are looking for a specific reward, such as the 300-key or 500-key wrench gift.

3. Save Keys for Bulk Purchase

Open the 500-key gift for 120 Golden Wrenches when you have both the keys and the gift. The 300-key gift for 70 wrenches is the alternative when you need them sooner.

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

Unused keys carry over to the next Gacha Go event; unopened gifts do not. If you cannot open the gift you want before the event ends, keep your keys and obtain that gift again in a later event.

Storage Management

Full storage does not stop draws. With all four gift slots occupied, you can still receive keys and other event rewards, but no new gifts. The four gifts already in storage stay in place.

Any unopened gift can be removed to make room for a replacement. Free a slot only when you are looking for a specific gift, such as the 300-key or 500-key wrench gift. Otherwise, there is no need to remove gifts just to keep drawing.

Gacha Go vs VIP Shop

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

Use Gacha Go for bulk Golden Wrench progress when you can fund it without breaking your diamond reserve. Otherwise, keep using the VIP Shop and carry your keys into a later event.