# Building a Collection ## Building a Collection Players must build their collection of cards from the various sets of cards within Splinterlands to create teams under different rulesets and battle conditions. Keep the distinction between [Ranked Play Modes](https://docs.splinterlands.com/gameplay/modern-and-wild-ranked-battles) in mind while building your collection. Though many Wild/Survival cards are powerful and enticing, they may not be used with the Modern format. Review [Sets & Editions](https://docs.splinterlands.com/cards/sets-editions) for a comprehensive look at the various cards Splinterlands has to offer. ### **Buying Booster Packs** Players can purchase Booster Packs from the Conclave Arcana set using [Credits](https://docs.splinterlands.com/splinterlands-credits) or [Dark Energy Crystals](https://docs.splinterlands.com/dark-energy-crystals). There are 4 different packs:

To purchase packs, click [Splinterlands Shop](https://splinterlands.com/shop/packs) and click Conclave Arcana in the drop-down menu. You can click [Splinterlands Shop](https://splinterlands.com/shop/packs) and then Card Packs from the main navigation or on the landing page as well. You can find more details from those different packs here: [Purchasing Booster Packs | Splinterlands](https://docs.splinterlands.com/cards/booster-packs/purchasing-booster-packs)
[**Buying Old Sets Booster Packs** ](https://docs.splinterlands.com/cards/sets-editions)- Players can purchase old booster packs from the [Splinterlands](https://splinterlands.com/market/other-items) peer-to-peer market. [**Buying Cards**](https://docs.splinterlands.com/cards/markets/buying-cards) - Players can purchase individual cards from the [Splinterlands](https://splinterlands.com/market/card-sales) peer-to-peer market with Dark Energy Crystals or Credits. [**Renting Cards**](https://docs.splinterlands.com/cards/rentals-and-delegations/the-card-rental-system) **-** Because HIVE blockchain assets can be *delegated, meaning loaned,* to other accounts, cards can be rented using the rental marketplace at [Splinterlands](https://splinterlands.com/market/card-rentals) or third-party markets. Rented cards cannot be combined, sold, or transferred, but the renter can play them and they count toward that player's [Collection Power](https://docs.splinterlands.com/gameplay/collection-power) for tournaments. Renting cards is an excellent way for players to increase the diversity of their playable deck. ### Archons are Key To compete with leveled-up [*Units*](https://docs.splinterlands.com/gameplay/types-of-cards/monsters), remember that leveled-up [*Archons*](https://docs.splinterlands.com/gameplay/types-of-cards/summoners) are also needed. If you have leveled up card Units beyond your summoning capability, they will always be limited in a battle to the maximum level your archons allow. That's why it's a good idea to level up your Archons first, then level up the Unit cards to meet their summoning level. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.splinterlands.com/gameplay/building-a-collection.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.