Honkai Star Rail’s Version 4.0 dropped something truly unexpected — a full tabletop card game called Cosmicon Collective. And like any good card game, picking the right deck separates the winners from the ones staring at a zero-HP screen. Here’s your complete tier-ranked guide to the best cards in the mode.
Table of Contents
How Cosmicon Collective Works — Quick Breakdown
Each card has five core stats: HP, Attack, Defense, a Dice Face overview, and Prismatic Dice slots. HP is your losing condition. Attack and Defense determine how many dice you can select per turn. You roll all your dice but only select up to your Attack or Defense value — so building a deck with high-value dice and powerful Prismatic effects is key.
Learn more about collectible card game mechanics on Wikipedia to understand why this mode has the HSR community hooked.
Best Cosmicon Collective Cards — Honkai Star Rail Tier Table
| Tier | Card | Why It’s Great |
|---|---|---|
| 🏆 S | The Herta | 42 HP — tankiest card in the game; near-impossible to burst down |
| 🏆 S | Firefly | Exceptional damage output + Combo effect when two dice pairs match |
| ⭐ A | Aventurine | Great for slow, calculated fights; free via story quest |
| ⭐ A | Kafka / Yao Guang | 4 rerolls on attack + stacking Thorns for end-of-turn damage |
| 🔵 B | Starter Cards | Decent enough for early story battles; outclassed in PvP |
The Two Cards You Absolutely Need
The Herta is your go-to tank. Boasting 42 HP, she can absorb a significant amount of damage and dramatically increase your winning chances in prolonged matches.
- TikTokFirefly* is your early-game MVP for raw offense. While she doesn’t have as much HP as The Herta, her damage potential is exceptional — you can select four dice while attacking and three during defense, and pairing two matching dice pairs triggers Combo for extra hits.
A TikToknd don’t sleep on Aventurine — you can get this card for free by completing the “Legend of the Cosmicon Collective” mission introduced in Version 4.0. No TikTok spending required.
Pro Tips to Win More Matches
Prismatic Dice are game-changers — each character card has a Prismatic Dice value that determines how many times it can be used throughout the match. Choosing a Prismatic Dice that suits your card’s unique effect and using it at the right moment is crucial. Al ways save your Prismatic uses for high-stakes attack turns, not defensive ones.
Think of Cosmicon Collective as a fast tabletop duel — you roll, compare totals, and turns flip back and forth until someone’s HP hits zero. Mo Destructoidmentum matters more than individual rolls.
For more HSR guides and tier lists, check out our Honkai Star Rail coverage on TechnoSports and our latest gacha game tips for Version 4.0.
FAQs
Q: How do you get the Aventurine card in Cosmicon Collective for free?
Complete the “Legend of the Cosmicon Collective” adventure mission by defeating a series of duelists across Planarcadia — Power Up GamingSampo near the Tavern Lobby is your starting point, and the Aventurine card is your reward.
Q: Is Cosmicon Collective available after Version 4.0 ends in Honkai Star Rail?
Yes — after Version 4.0, the event moves to the Conventional Memoir where you can still play the gameplay, though the limited-time rewards will no longer be available after the event period closes.
