---
title: "Mason the Hedgehog: yxji's 444-piece HarryPotterObamaSonic10Inu NFT collection | Bitcoin Obama Wiki"
url: https://bitcoinobama.com/masonthehedgehog
description: "Mason the Hedgehog, the 444-piece Ethereum NFT collection by the $BITCOIN artist yxji (@mryxji), a companion to the Sproto Gremlins and free to claim for Sproto holders, with a live floor price and top bid."
---

# Mason the Hedgehog

Mason the Hedgehog

![Mason the Hedgehog collection image](https://bitcoinobama.com/assets/nft/masonthehedgehog.jpg)Collection image

| Artist | [yxji](https://bitcoinobama.com/yxji) |
| --- | --- |
| Community | [HarryPotterObamaSonic10Inu](https://bitcoinobama.com/hpos10i) ($BITCOIN) |
| Chain | Ethereum (ERC-721) |
| Supply | 444 (on-chain totalSupply) |
| Mint | Free claim for Sproto Gremlin holders, then a 48-hour public mint; closed at 444 on Aug 7, 2026 |
| Raster | [Mason the Hedgehog by yxji](https://www.raster.art/artwork/mason-the-hedgehog-by-yxji) |
| Contract | [`0x8696…d152`](https://etherscan.io/address/0x8696f201e8e4fdfbf8a7b0c5195ea152232cd152) |
| Links | [OpenSea](https://opensea.io/collection/mason-the-hedgehog) |

**Mason the Hedgehog** is a 444-piece Ethereum NFT collection by the artist [yxji](https://bitcoinobama.com/yxji). Its OpenSea description calls Mason “the least controversial (more legal) Mascot of HarryPotterObamaSonic10inu. Originally created as a companion to [Sproto Gremlins](https://bitcoinobama.com/sprotogremlins) and bro just grew into this chaotic rascal that everybody loves.”[^1] Sproto, the mascot of [HarryPotterObamaSonic10Inu](https://bitcoinobama.com/hpos10i) ($BITCOIN), and the Sproto Gremlins are the collection's starting point.

Live floor price and top bid

| Floor | **—** |
| --- | --- |
| Floor (USD) | — |
| Top bid | **—** |
| Top bid (USD) | — |
| 24h floor change | — |
| Chain | Ethereum |
| Contract | [`0x8696…d152`](https://etherscan.io/address/0x8696f201e8e4fdfbf8a7b0c5195ea152232cd152) |

Data: [OpenSea](https://opensea.io/collection/mason-the-hedgehog).

## Mint

Holders of any of the 3,333 Sproto Gremlins could claim a Mason for free. On Aug 1, 2026 yxji reported 100 vault pieces plus 337 claims and said the mint would switch to a public phase on Aug 4 for 48 hours.[^2] Every mint in the holder and public phases entered a raffle for one mystery Sproto Gremlin and five Masons from the vault.[^3] On Aug 7, 2026 he announced “Mason Mint has been closed at 444”, with the reveal 24 hours later[^4], and the next day he said the raffle had been drawn with Grok and won by @Bidnehhh.[^5]

After the reveal he wrote that when the collection expands, “the 444 are getting 444 custom 1/1”.[^6]

## Traits

Each token's metadata lists five traits: Antics, Top, Face, Head and Kicks. Mason #1, for example, has the antic “TableClock”, a bucket hat and “J4” kicks.

## See also

- [yxji](https://bitcoinobama.com/yxji)
- [Sproto Gremlins](https://bitcoinobama.com/sprotogremlins)
- [$BITCOIN (HarryPotterObamaSonic10Inu)](https://bitcoinobama.com/hpos10i)
- [NFT collections](https://bitcoinobama.com/nfts)

## References

1. [Mason the Hedgehog on OpenSea](https://opensea.io/collection/mason-the-hedgehog).
2. [@mryxji](https://bitcoinobama.com/yxji) (Aug 1, 2026). [Post on X](https://x.com/mryxji/status/2083613409350926592).
3. [@mryxji](https://bitcoinobama.com/yxji) (May 19, 2026). [Post on X](https://x.com/mryxji/status/2056795542609694864).
4. [@mryxji](https://bitcoinobama.com/yxji) (Aug 7, 2026). [Post on X](https://x.com/mryxji/status/2085694178584064199).
5. [@mryxji](https://bitcoinobama.com/yxji) (Aug 8, 2026). [Post on X](https://x.com/mryxji/status/2086091785990963451).
6. [@mryxji](https://bitcoinobama.com/yxji) (Aug 7, 2026). [Post on X](https://x.com/mryxji/status/2085762844096917966).

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Source: https://bitcoinobama.com/masonthehedgehog · Site index: https://bitcoinobama.com/llms.txt