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Build a Base and Steal Guide
Progression

Build a Base and Steal Rebirth and Progression Guide

The full 16-tier rebirth ladder: Cash costs, required pet pairs, permanent rewards, and the gear each tier unlocks, from 50,000 Cash at tier 1 to 10 quadrillion at tier 16.

Checked 2026-10-0616 documented tiers
Quick answer

The short version

Rebirth is the progression spine: meet the Cash plus pet-pair requirement, claim the tier, and permanently gain Luck (2x up to 208x), +2 pet slots, +3 defense blocks, and new gear. Plan every session around the next rung's requirement pair.

How rebirth works

After spawning, the Rebirth icon sits on the left side of the screen (per the Sportskeeda guide published July 25, 2026). Each of the 16 tiers requires a Cash pile plus a specific pair of pets, and claiming the tier pays the rewards permanently.

Every tier grants the same shape of reward: a Luck multiplier, +2 max pet slots, +3 defense blocks, and at least one gear item. The Luck line grows from 2x at tier 1 to 208x at tier 16, which is why long-term players roll dramatically better species than new accounts.

Required pets must stay in your base until the tier is claimed. Selling a requirement pet mid-run stalls the ladder no matter how much Cash is banked.

The early ladder (tiers 1-8)

Tiers 1-8 run from 50,000 Cash to 10,000,000 and ask for accessible species: Cat + Chicken, Bunny + Bat, Owl + Llama, Zebra + Elephant, Lion + Stegosaurus, YiQi + Mammoth, Velociraptor + Azhdarchid, and Gargoyle Bat + Cockatrice.

Gear rewards in this band are foundational: Steel Bat and Speed Coil (tier 1), Gravity Coil (tier 2), Stone Bat (tier 3), Cobalt Bat (tier 4), Dual Coil (tier 5), Grapple Hook (tier 6), Obsidian Bat (tier 7), and Bear Trap (tier 8).

Notice the design: by tier 8 you own both a raid kit (bats, coils, grapnel) and a defense tool (Bear Trap). The ladder deliberately equips both sides of the loop.

The late ladder (tiers 9-16)

Tiers 9-16 climb from 25,000,000 to 10 quadrillion Cash with mythic pairs: Sphinx + Pegasus (tier 9), Roc + Hydra (tier 10), Qilin + Simurgh (tier 11), Dragon + Unicorn (tier 12), Golden Kitsune + Gold Unicorn (tier 13), Gold Dragon + Gnome (tier 14), Fairy + Mermaid (tier 15).

Rewards scale with them: Crystal Bat and Juggernaut (tier 9), Golden Bat (tier 10), Shrink Potion (tier 11), Goku Bat and Invisibility Cloak (tier 12), Sky Bat and Body Swap Potion (tier 13), Galaxy Bat and Rage Bat (tier 14), Hacker Bat, Ban Hammer and Flashbang (tier 15).

Tier 16 is the capstone at 10 quadrillion Cash: 208x Luck, the Demon Bat, TNT, a Magnet, and a Sniper Rifle - the heaviest documented toolkit in the game.

How to plan a rebirth run

Identify the next tier's pair and protect those two pets immediately - deepest base slot, no selling, no raid-carry. Everything else in the session routes Cash toward the requirement.

Bank surplus into permanent multipliers first. Because each tier raises Luck, slots, and defense at once, reaching the next rung usually outvalues any single pet purchase in the same price range.

Claim in a private server if timing anxiety is a factor; the claim works the same and nothing public can interrupt it. Then re-run the defense audit, because the new tier's gear changes both your attack options and the ones aimed at you.

The full ladder

All 16 rebirth requirements and rewards

every rebirth pays a permanent Luck multiplier, +2 max pet slots, +3 defense blocks, and at least one gear item (bats, coils, potions, or tools)

Rebirth requirements and rewards, tiers 1-16
TierCash costRequired petsRewards
Rebirth 150,000Cat + Chicken2x Luck, Steel Bat, Speed Coil
Rebirth 2150,000Bunny + Bat4x Luck, Gravity Coil
Rebirth 3750,000Owl + Llama8x Luck, Stone Bat
Rebirth 41,500,000Zebra + Elephant10x Luck, Cobalt Bat
Rebirth 52,500,000Lion + Stegosaurus15x Luck, Dual Coil
Rebirth 65,000,000YiQi + Mammoth20x Luck, Grapple Hook
Rebirth 77,500,000Velociraptor + Azhdarchid25x Luck, Obsidian Bat
Rebirth 810,000,000Gargoyle Bat + Cockatrice30x Luck, Bear Trap
Rebirth 925,000,000Sphinx + Pegasus40x Luck, Crystal Bat, Juggernaut
Rebirth 10100,000,000Roc + Hydra48x Luck, Golden Bat
Rebirth 11250,000,000Qilin + Simurgh56x Luck, Shrink Potion
Rebirth 121,000,000,000Dragon + Unicorn64x Luck, Goku Bat, Invisibility Cloak
Rebirth 1310,000,000,000Golden Kitsune + Gold Unicorn76x Luck, Sky Bat, Body Swap Potion
Rebirth 14100,000,000,000Gold Dragon + Gnome96x Luck, Galaxy Bat, Rage Bat
Rebirth 1510,000,000,000,000 (10 trillion)Fairy + Mermaid128x Luck, Hacker Bat, Ban Hammer, Flashbang
Rebirth 1610,000,000,000,000,000 (10 quadrillion)final-ladder pets from the preceding tiers208x Luck, Demon Bat, TNT, Magnet, Sniper Rifle

Source: Sportskeeda rebirth guide (2026-07-25, updated 2026-08-31); Pro Game Guides rebirth summary. Checked 2026-10-06.

the Rebirth icon on the left side of the screen after spawning. required pets stay in your base until the rebirth is claimed, so selling them mid-run stalls progression.

Pro Game Guides counts 29 different pets across all 16 rebirths, including Fish-type pets and pets with the Golden mutation; the Sportskeeda per-level table names the species above, and the two counts differ only in how mutated variants are tallied.

the Luck multiplier grows from 2x at Rebirth 1 to 208x at Rebirth 16, which is why late-game players roll rarer pets far more often.

FAQ

Rebirth questions

How many rebirths are in Build a Base and Steal?

16. Pro Game Guides counts 29 different pets across the full ladder, including Fish-type pets and Golden-mutation variants.

What does each rebirth give?

A permanent Luck multiplier, +2 max pet slots, +3 defense blocks, and gear - the Luck line runs from 2x at tier 1 to 208x at tier 16.

What are the rebirth requirements?

Each tier needs a Cash amount plus a specific pet pair - 50,000 with Cat + Chicken at tier 1, scaling to 10 quadrillion at tier 16. The full table is above.

Do required pets get consumed?

They must stay in your base until the tier is claimed; the published guides treat them as held, not sold, so keep requirement pairs intact through the run.

Which rebirth gear matters most?

Tier 1's Steel Bat and Speed Coil define the early raid loop; tier 8's Bear Trap is the first pure defense tool; tier 16's TNT, Magnet, and Sniper Rifle are the endgame raid kit.

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