Fossils, Relics, and Ambers are the boost layer that separates casual players from progression-focused ones. While the base game loop of eating and growing works without any boosts, boost stacking accelerates growth by up to 38x or more — turning hours of grinding into minutes. This guide covers every boost type, their tier progression, and the optimal stacking strategy for maximum growth speed.
What Are Fossils, Relics, and Ambers?
Be Dino has three categories of boost items that provide passive stat bonuses:
Fossils: The base-tier boost items. Fossils provide Food Radius, XP gain, and Growth speed bonuses. They come in three tiers (Tier 1, Tier 2, Tier 3), with each tier providing stronger bonuses.
Relics: The mid-to-high-tier boost items. Relics provide the same stat categories as Fossils (Food Radius, XP, Growth) but with stronger numerical values. Relics come in Small and Huge variants.
Ambers: The active-eating boost items. Ambers specifically boost growth speed while you are actively eating food. They come in tiers similar to Fossils.
The key principle: These three boost types STACK together. Equipping Fossils + Relics + Ambers simultaneously compounds their effects, creating the massive multiplier that experienced players rely on.
Fossil Tiers — Complete Breakdown
| Tier | Food Radius | XP Bonus | Growth Speed | How to Obtain |
|---|---|---|---|---|
| Tier 1 Fossil | Small increase | Small XP bonus | Small growth boost | Common drop, codes |
| Tier 2 Fossil | Moderate increase | Moderate XP bonus | Moderate growth boost | Uncommon drop, chest rewards |
| Tier 3 Fossil | Large increase | Large XP bonus | Large growth boost | Rare drop, boss rewards |
Fossil tips:
- Always equip your highest-tier Fossil — never leave a Fossil slot empty
- Tier 1 Fossils are free from codes (HUGE150K gives Tier 1 Medium XP and Luck Fossils)
- Higher-tier Fossils are worth the investment because their bonuses compound with Relics and Ambers
- The "Food Radius" bonus is underrated — larger food collection range means faster eating, which means faster growth
Relic Types — Stronger Than Fossils
| Type | Food Radius | XP Bonus | Growth Speed | How to Obtain |
|---|---|---|---|---|
| Small Relic | Moderate | Moderate | Moderate | Chest rewards, events |
| Huge Relic | Maximum | Maximum | Maximum | Boss rewards, rare drops |
Relic tips:
- Relics provide the same stat categories as Fossils but with significantly stronger values
- Prioritize Growth and XP Relics — these accelerate the core game loop
- A Huge Relic in a Growth slot provides more growth acceleration than a Tier 3 Fossil in the same slot
- Relic + Fossil + Amber stacking creates the largest multipliers
Amber Types — Growth While Eating
| Type | Growth Boost | When Active | How to Obtain |
|---|---|---|---|
| Tier 1 Amber | Small growth boost | While eating food | AMBER code, common drops |
| Tier 2 Amber | Moderate growth boost | While eating food | Uncommon drops, chest rewards |
| Tier 3 Amber | Large growth boost | While eating food | Rare drops, boss rewards |
Amber tips:
- Ambers only boost growth while you are actively eating — they do not affect passive growth
- The AMBER code gives a free Tier 1 Small Growth Amber — redeem it immediately
- Combine Ambers with Food Radius Fossils for maximum eating efficiency
- Higher-tier Ambers provide dramatically more growth per eating cycle
Boost Stacking Strategy — How to Reach 38x+ Multiplier
The most powerful aspect of the boost system is stacking. When you equip Fossils + Relics + Ambers + Gamepass boosts together, their effects multiply rather than add:
Stacking order (build from base up):
- Base stats — Your dinosaur's default XP multiplier (varies by species tier)
- Fossils — Add Food Radius, XP, and Growth bonuses
- Relics — Add stronger versions of the same bonuses
- Ambers — Add Growth boost while eating
- Gamepasses — Add 2x Growth Bonus and +50% XP (if purchased)
Example stacking calculation:
| Boost Layer | Multiplier Effect | Cumulative Effect |
|---|---|---|
| Mythic species (base) | 13x XP multiplier | 13x |
| Tier 3 Fossils (all slots) | ~1.5x growth + XP | ~19.5x |
| Huge Relics (best slots) | ~1.5x additional | ~29x |
| Tier 3 Ambers (growth) | ~1.3x while eating | ~38x |
| 2x Growth gamepass | 2x growth speed | ~76x growth |
| +50% XP gamepass | 1.5x XP | ~114x XP |
Note: The exact multiplier depends on which specific Fossils, Relics, and Ambers you have equipped. The 38x+ figure is a common community reference for well-stacked Mythic species with Tier 3 boosts.
Which Boosts to Prioritize
If you have limited boost items, prioritize in this order:
- Growth speed — The most impactful stat because faster growth means less time vulnerable and more time at competitive size
- XP multiplier — Accelerates species-level progression and chest unlock earning
- Food Radius — Indirectly accelerates growth by letting you eat from further away
Priority matrix:
| Boost Slot | First Priority | Second Priority | Third Priority |
|---|---|---|---|
| Fossil 1 | Growth speed | XP multiplier | Food Radius |
| Fossil 2 | XP multiplier | Growth speed | Food Radius |
| Relic 1 | Growth speed | XP multiplier | — |
| Amber 1 | Growth (any tier) | — | — |
Getting Free Boosts from Codes
Several active codes provide free boost items:
| Code | Boost Item | Tier | Value |
|---|---|---|---|
| HUGE150K | Tier 1 Medium XP Fossil | T1 | Moderate XP bonus |
| HUGE150K | Tier 1 Medium Luck Fossil | T1 | Better chest drops |
| AMBER | Tier 1 Small Growth Amber | T1 | Small growth boost while eating |
| ANKY | Growth Boost | — | Temporary growth acceleration |
Always redeem codes immediately — these free boosts are too valuable to skip. Even Tier 1 boosts provide meaningful acceleration when stacked with other items.
Fossil and Relic Acquisition Methods
Obtaining Fossils and Relics in Be Dino requires understanding the drop mechanics and optimal farming strategies:
Fossil drop rates:
| Fossil Type | Drop Source | Approximate Drop Rate |
|---|---|---|
| Common Fossil | Any food / activity | ~20% |
| Rare Fossil | Boss fights, events | ~5% |
| Epic Fossil | Boss fights, high-level activities | ~2% |
| Legendary Fossil | Boss exclusive drops | ~0.5% |
Relic drop rates:
| Relic Type | Drop Source | Approximate Drop Rate |
|---|---|---|
| Common Relic | Events, quests | ~10% |
| Rare Relic | Boss fights, rare events | ~3% |
| Epic Relic | Boss exclusive | ~1% |
Boost Stacking Optimization by Game Mode
Different game modes benefit from different boost configurations:
| Game Mode | Best Fossil Config | Best Relic Config | Priority Amber |
|---|---|---|---|
| AFK Farming | Food Radius x2 + Growth Speed | Food Radius + Growth | Growth Amber |
| Active Growth | Growth Speed x2 + Food Radius | Growth Speed + XP | Growth Amber |
| KOTH Events | Growth Speed + Defense | XP Multiplier + Growth | XP Amber |
| Boss Fights | Growth Speed + Defense | Defense + Growth | Growth Amber |
| PvP Combat | Growth Speed + XP | XP Multiplier + Defense | XP Amber |
For detailed boost strategies, visit our boost stacking guide. For Relic fusing, read our fusing guide.
Deep Dive: Relic Fusing Mechanics
Relic fusing is one of the most important progression mechanics in Be Dino. Understanding the fusing system is essential for maximizing your boost stacking potential.
Relic fusing rules:
- Fuse two identical Relics of the same tier to create a higher-tier Relic
- The resulting Relic inherits the category of the input Relics (e.g., two Growth Speed Common Relics → one Growth Speed Rare Relic)
- Fusing success rate decreases with higher tiers
Fusing probability table:
| Input Tier | Output Tier | Success Rate | Fusing Cost |
|---|---|---|---|
| Common + Common | Rare | 100% | None |
| Rare + Rare | Epic | 75% | Small Gem fee |
| Epic + Epic | Legendary | 50% | Moderate Gem fee |
| Legendary + Legendary | Mythic | 25% | Large Gem fee |
Optimal fusing strategy:
- Always fuse Common Relics immediately — 100% success rate
- Fuse Rare Relics when you have duplicates — 75% success is favorable
- Consider waiting for duplicate Epic Relics before fusing — 50% success means a significant chance of losing both Relics
- Never fuse Legendary Relics unless you have multiple copies — 25% success is too risky for unique items
Relic category priority for fusing:
- Growth Speed (most universally useful)
- Food Radius (critical for AFK)
- XP Multiplier (useful for events)
- Defense (only for boss fights and PvP)
FAQ
What is the maximum XP multiplier I can achieve? With optimal stacking (Mythic species + Tier 3 Fossils + Huge Relics + Tier 3 Ambers + Gamepasses), the multiplier can exceed 38x base. With gamepasses, the effective multiplier is even higher.
Should I equip Fossils even if they are Tier 1? Yes. Any boost is better than no boost. A Tier 1 Fossil provides a small but meaningful bonus. Always fill all boost slots — never leave them empty.
How do I get higher-tier Fossils and Relics? Higher-tier boosts come from chest rewards (Epic and Legendary chests), boss fight drops, and event rewards. The HUGE150K code provides Tier 1 Fossils for free.
Do Fossils and Relics stack or replace each other? They stack. Fossils and Relics occupy different slots and their bonuses compound. This is why full stacking (Fossils + Relics + Ambers) creates the largest multipliers.
Does the 2x Growth gamepass stack with Fossils? Yes. The 2x Growth gamepass multiplies on top of your Fossil/Relic/Amber bonuses, creating an even larger effective multiplier. See our gamepasses guide for gamepass analysis.
For more on Gems and economy, visit our Gems guide. For species tiers, check our tier list.