Be a Lucky Block Index System Guide

The Index System, introduced in Update 7 (May 2026), is a permanent progression layer that gives stacking luck and cash multipliers for every block you discover and every boss you defeat. Unlike event rewards or brainrot pulls that can be lost or replaced, Index bonuses are account-wide and permanent — they survive rebirths, event rotations, and meta shifts. Every block you collect does double duty: it advances your immediate earning power AND builds toward a permanent multiplier unlock that makes every future run stronger.

• Index multipliers are permanent account-wide bonuses that apply to every Lucky Block you use and every brainrot you hold, regardless of rebirth or event cycle. Unlike mutation bonuses (+50% to +200%) that come and go with event windows, Index bonuses are always active, making them the single most efficient long-term investment in the game.
• There are at least five Base Indexes — Starter, Candy, Gold, Diamond, and Arcade — with escalating unlock requirements and reward tiers. Each base you complete adds a stacking multiplier to your global luck and cash output, meaning a player who has completed three Base Indexes has three permanent multipliers running simultaneously.
• Unlocking a Base Index requires discovering all blocks and defeating all bosses associated with that base. For example, Starter Base Index completion means collecting every Common-to-Rare block variant and clearing early-game boss encounters. Start with Starter Base Index — it has the lowest requirements and gives you a permanent multiplier within your first few sessions.
• The Arcade Base Index is the endgame target and uses a loan system where players can temporarily borrow high-tier brainrots to complete the index. This is the most expensive index unlock service on the Eldorado marketplace ($2-$6 per unlock), which confirms its high in-game value. Only pursue Arcade after you have completed the easier Base Indexes.
• Index progress is NOT reset by rebirth — this is crucial. While rebirth wipes your cash and resets your block purchases, your Index unlocks and their permanent multipliers stay with you forever. This means every Index you complete before a rebirth permanently raises your post-rebirth earning floor.
• The Index System rewards completionist play. A player who skips collecting all block variants on a base leaves permanent luck on the table. As of Update 7, the game tracks your Index progress through an in-game menu, so you always know which blocks and bosses you still need to complete each Base Index. Prioritize finishing an Index before moving on to the next base tier — the stacking multipliers compound and make every subsequent unlock faster.