Idle Heroes: How to Claim Free Anniversary Rewards with CSG

To claim top-tier free anniversary rewards in Idle Heroes without spending money, save your Contract Starry Gems (CSG) until you have enough to guarantee a major milestone in the Soul Awakening Gala. Pair these saved gems with daily login tokens, recycle low-tier awakenings to refund spent CSG, and allocate accumulated Diamonds toward high-value event packages containing Sublimation Essence, Core of Origin shards, or Mysterious Artifact chests.

Spend CSG Only at Guaranteed Event Milestones

Contract Starry Gems serve as a critical bridge currency during major anniversary events, allowing free players to reach milestone ladders alongside paid Starry Gems. However, spending CSG without planning leads to diminishing returns if you stop short of a major reward tier.

1. Check the milestone ladder: Identify the point requirements for premium reward tiers, such as Sublimation chests and Core of Origin shards.
2. Calculate your total resources: Combine your banked CSG, free event awakening tokens, and projected retirement refunds before committing.
3. Commit or hoard: If your balance cannot reach a definitive milestone tier that awards permanent account items, save your CSG for a future event track.

Recycle Awakened Heroes During the Gala

The Soul Awakening Gala awards points based on the tier of hero awakenings rolled during the event. To stretch your CSG budget as far as possible, recycle unwanted rolls immediately to reclaim a portion of your spent currency.

Retiring E- and D-tier awakenings returns a percentage of your gems, lowering the net CSG required to hit successive milestone thresholds. If you roll an unneeded B-tier or higher hero, selling it in the Auction House provides tradeable Starry Gems that can fund future events.

Collect Daily Logins and Event Mail

Missing a single check-in day can prevent an account from completing the final cumulative milestone tracks. To collect every free baseline resource:

• Claim all server-wide celebration mail and event exchange codes right away to gather bonus summon scrolls, Diamonds, and celebration tokens.
• Complete daily quests and event check-ins to unlock progress puzzle nodes.
• Track the cumulative login calendar to ensure the grand celebration chest unlocks before the weekly timer expires.

Allocate Diamonds to Premium Packages

Do not spend Diamonds on routine marketplace refreshes or basic summon scrolls during the anniversary window. Instead, allocate them toward limited-time event packages:

• Growth plans and diamond rebate tracks: Invest stockpiled Diamonds into rebate tracks that return currency while awarding milestone points.
• Discounted event boxes: Purchase packages that contain Mysterious Artifact selection chests, Core materials, or Glorious Relics.
• Reserve thresholds: Avoid spending Diamonds down to zero; maintain a reserve so you do not miss guaranteed artifact tiers.

Anniversary Shop Exchange Priorities

When converting free event tokens in the celebration exchange shop, prioritize permanent progression materials over short-term upgrades:

1. Sublimation Essence and Core of Origin Shards: These materials unlock critical active and passive skill upgrades for Transcendence heroes and offer the highest long-term account value.
2. Mysterious Artifact Selection Chests: Priority items for accounts still building core sets such as Melodic Strings or Demon Bells.
3. Items to avoid: Never spend anniversary currency on standard 5-star hero chests, basic spirit fodder, or cosmetic skins, as all of these can be obtained through routine daily play.