The Seven Deadly Sins: IDLE Diamond Farming Guide

To farm Diamonds efficiently in The Seven Deadly Sins: IDLE, focus on pushing story stages as far as possible while continuously updating your Hero Collection book whenever you acquire or evolve units. Supplement these one-time rewards by clearing daily and weekly missions, climbing challenge towers, and participating in Arena seasons.

Maximizing the Hero Collection Book

The Hero Collection book serves as one of the most reliable sources of Diamonds when expanding your roster. Every new hero summoned and every star-level advancement contributes toward collection milestones that reward premium currency.

Evolve Low-Tier Heroes: Do not ignore low-rarity units. Evolving or awakening duplicate low-tier heroes increases your overall collection percentage and yields milestone payouts.
Check After Multi-Summons: Open the collection tab following major summoning sessions to claim unlocked milestone rewards. Reinvesting these rewards back into banners helps maintain steady pulling momentum.

Pushing Story Stages

Story stages yield fixed Diamond rewards for first-time chapter and stage completions. Because AFK idle rewards do not replace active stage pushing bonuses, your team should consistently push into higher stages.

Upgrade Primary Damage: If stage progress stalls, allocate resources to your main DPS unit to push past stage bottlenecks.
Equip Optimal Gear: Maintain updated gear sets across your main combat unit to clear stages quickly and reduce idle downtime.
Claim First-Time Bonuses: Complete higher chapters early to secure the initial surge of Diamonds required for banner pulls.

Daily and Weekly Task Routines

Once first-time story rewards are claimed, routine tasks form your baseline Diamond income.

Daily Missions: Complete standard activities—such as upgrading heroes, participating in combat modes, and collecting idle rewards—to collect daily Diamond rewards.
Weekly Missions: Complete broader weekly objectives to earn larger lump-sum Diamond bonuses. Prioritize tasks offering direct currency payouts if play time is limited.

Tower, Arena, and Challenge Modes

Challenge modes deliver tiered currency payouts that reward roster depth and team optimization.

Challenge Mode	Reward Trigger	Farming Strategy
Tower Climbing	Floor milestone clears	Push as high as possible before hitting difficulty walls.
Event Challenges	Limited-time objective completion	Complete event-specific tasks before their active window closes.
Arena	End-of-season rank placement	Participate regularly to qualify for tier-based season payouts.

Managing Diamond Spending

Diamonds become significantly harder to accumulate in the mid-to-late game after story milestones are exhausted. Reserve your accumulated currency for high-value banner pulls featuring essential hero units rather than spending on minor progression boosts. Save your stash until a key unit arrives to avoid running out of currency when high-priority banners release.