> For the complete documentation index, see [llms.txt](https://docs.thorfi.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thorfi.io/project-information/thorfi-nfts/nft-actions/fusion.md).

# Fusion

Fusion is an action taken on the [Marketplace](/project-information/capsule-marketplace.md) combining one Thor [Keycard](/project-information/thorfi-keycards.md) & one Odin [Keycard](/project-information/thorfi-keycards.md), becoming a [Capsule](/project-information/thorfi-capsules.md) NFT.

{% hint style="info" %}
Keycards must be of the same variation in order to fuse - this means both must be from an [Origin Burn](/project-information/thorfi-nfts/nft-actions/origin-burn.md) or both from a [Drift Burn](/project-information/thorfi-nfts/nft-actions/drift-burn.md). An Origin burned keycard cannot be fused with a Drift burned keycard.
{% endhint %}

{% content-ref url="/pages/T0qFBemgJGIaokA6k6c6" %}
[ThorFi Capsules](/project-information/thorfi-capsules.md)
{% endcontent-ref %}

{% content-ref url="/pages/A8UpluojpNIcpT0Agy8f" %}
[Open A Capsule](/project-information/thorfi-nfts/nft-actions/open-a-capsule.md)
{% endcontent-ref %}