F2P Optimization Guide
This guide is for free-to-play players who want to maximize progress without spending real money. Every diamond, gold coin, and material matters — this guide tells you exactly where to spend them.
F2P Resource Priority (Most → Least Important)
- Pet Passive Upgrades — Team-wide permanent buffs. Best gold investment in the game.
- Monster Card Star-ups — Exponential stat scaling. Use trade permits wisely.
- Gem Combining — Free power from combining drops. Buy gems from gold shop daily.
- Equipment Affix Rerolling — Only reroll weapons/armor you plan to keep long-term.
- Hero Skill Resets — Only if you made a bad skill choice; otherwise save stones.
Diamond Budget (F2P)
You earn diamonds from: achievements, daily login, events, arena rewards, and Abyss milestones. Typical F2P income: ~200–500 diamonds/day depending on progress.
Best Diamond Spending
| Priority | Item | Cost | Why |
|---|---|---|---|
| 1 | Card Gacha (10x pull) | 1,800 | Most efficient way to get ★3/★4 cards |
| 2 | Pet Egg | ~200 | Chance at rare pets |
| 3 | Trade Permits | — | Convert to card gacha pulls |
| 4 | Gem Select Packs | — | When on discount |
Never Spend Diamonds On
- Gold (terrible exchange rate)
- Speed-ups (not worth it)
- Random single card pulls (always do 10x)
- Cosmetics (zero gameplay value)
Gold Shop — What to Buy Daily
The shop refreshes with randomized items. Here's what to prioritize:
Always Buy (Tab 1)
| Item | Notes |
|---|---|
 Gem Select Pack |
Any level, always worth it |
 Stone of Forgetting |
5,000–25,000g each, buy all |
 Inert Magic Crystal |
For gem crafting, buy if affordable |
 Diamonds |
If they appear for gold, always buy |
Always Buy (Tab 2 — Pets)
| Item | Notes |
|---|---|
 Pet Fluid |
Any type, always buy |
 Pet Feed |
Mid/High grade preferred |
 Pet Egg |
30,000g each, always buy |
Skip
- Lumber — Town generates enough
- Ingredients — Low priority
- Speed Device — Not worth gold
See the Daily Routine for a full daily checklist and the Shop Reference for complete item listings.
Optimal F2P Team Composition
Core Team (3 Heroes)
| Role | Recommended Build | Why |
|---|---|---|
| Tank | Howl Warrior | Keeps team alive with taunt + CC on enemies |
| Main DPS | Poison Archer | Poison scales without gear; best F2P DPS |
| Support | Healer Mage | Healing keeps team alive in longer fights |
Monster Card Assignments
| Hero | Best F2P Card | Effect |
|---|---|---|
 Howl Warrior |
 Rock Dragon (★4) |
+15% DEF, +10% ATK, self-buff stacking |
 Poison Archer |
 Forest Queen (★4) |
+500 poison dmg, +50% poison amp, Rose burst |
 Healer Mage |
 Boar King (★4) |
+15% CDR, resist shred on auto-attacks |
F2P Card Progression: Start with ★2 cards (Imp, Rock Drake) → work toward ★3 (Raptor, Golem) → eventually ★4 targets above.
Pet Setup (F2P Priority)
| Slot | Pet | Passive | Why |
|---|---|---|---|
| Active |  Bat |
— | Team-wide heal on auto-attack |
| Bench 1 |  Raptor |
Swift (+25→55% ATK speed) | Huge DPS boost for entire team |
| Bench 2 |  Cave Spider |
Corrode (-15→45% poison resist) | Synergy with Poison Archer |
Alternative bench pets:
Lava Raptor — Lethal (+10→50% crit) for crit-based teams
Metal Slime — Iron Wall (DEF + DR) for survival-focused teams
Pet passives are upgraded manually with gold and materials — don't forget to upgrade bench pet passives regularly. See the Pet System guide for full details.
F2P Gem Strategy
Gems are socketed into equipment. Two categories:
- Type 1 (Weapon/Ring): ATK, Crit Value, Crit Damage, Elemental Damage, Pure ATK
- Type 2 (Armor/Amulet): HP, DEF, All Resist, Anti-Crit, Damage Reflect, Hit Value, HP Regen
What to Socket
| Hero | Weapon Gems | Armor Gems |
|---|---|---|
| Howl Warrior |
 Holy Crystal (Pure ATK) or  Ruby (ATK) |
 Emerald (HP) +  Sapphire (DEF) |
| Poison Archer |
 Jadeite (Poison DMG) |
Emerald (HP) + Diamond (All Resist) |
| Healer Mage |
 Cobalt (Ice DMG) or Ruby (ATK) |
Emerald (HP) + Jade (HP Regen) |
Gem Level Scaling (Each level = 3x previous gems)
| Level | Ruby (ATK) | Emerald (HP) | Sapphire (DEF) |
|---|---|---|---|
| 1 | 30 | 300 | 30 |
| 2 | 60 | 600 | 60 |
| 3 | 120 | 1,200 | 120 |
| 4 | 240 | 2,400 | 240 |
| 5 | 480 | 4,800 | 480 |
| 6 | 960 | 9,600 | 960 |
| 7 | 1,920 | 19,200 | 1,920 |
| 8 | 3,840 | 38,400 | 3,840 |
| 9 | 7,680 | 76,800 | 7,680 |
| 10 | 15,360 | 153,600 | 15,360 |
| 11 | 30,720 | 307,200 | 30,720 |
Gem combining: 3 identical gems → 1 gem of next level. This means Level 5 = 81 Level 1 gems worth. See the Gem Guide for full details.
F2P Progression Milestones
| Abyss Depth | Target |
|---|---|
| 0–20 | Get all 3 heroes, equip any cards, start pet |
| 20–50 | First job advancement, ★2 cards on all heroes |
| 50–80 | Second job advancement, Level 3–4 gems, pet passives level 1–2 |
| 80–120 | ★3+ cards, pet passives level 3, start saving for ★4 card targets |
| 120–180 | Full ★3/★4 cards, Level 5–6 gems, pet quality C+ |
| 180+ | Optimize affixes, push pet passives to 4–5, max ★4 card stars |
See the Progression Roadmap for a detailed week-by-week breakdown.
Common F2P Mistakes
- Spending diamonds on gold — Gold comes from Abyss naturally
- Ignoring pet passives — They're the biggest power multiplier per gold spent
- Hoarding Trade Permits — Use them on card gacha; cards are essential
- Spreading upgrades across too many heroes — Focus on 3 core heroes
- Farming low Abyss for gear — Drop level is locked to depth, farming lower gives useless gear
- Rerolling affixes on temporary gear — Only reroll gear you'll use for 20+ levels
- Skipping daily shop check — Some items (gems, pet fluid) are hugely discounted