The newest NFTs Game “ My CryptoSaga ” Official Service Launches on May 31st! And, Auction of Original Art NFTs of MyCryptoSaga will start at UTC 12:00 on the same day.

May 31 · 11 min read

double (Head office: Tokyo, Japan, CEO: Hironobu Ueno), a developer of NFT/blockchain games, is pleased to announce the official launch of “MyCryptoSaga” (URL: https://www., the newest game for PC and smartphones that uses NFT (*Note 1). will be officially launched on May 31st, 2021.
On the same day, starting at UTC 12:00, the original art NFTs by Ryuji Noguchi, who created the art for this game, will be auctioned on OpenSea, the world’s largest NFTs marketplace.

The following is an overview of MyCryptSaga and the sale of the original art NFT.

About MyCryptoSaga (MCS)

<Outline of the game>

MCS is a mind card game that allows 2–4 players to enjoy real-time battles.
It can be played through a PC or smartphone web browser or wallet application.
Organize your 10 “Kami-Cards” and use strategy, skill and luck to beat your rivals!

<points of MCS>

1. The latest NFTs game from the developers of the worldwide hit “My Crypto Heroes”!
The development team behind the world’s №1 blockchain game (*Note 2), nicknamed “MCH”, has reunited to develop MCS using the most advanced blockchain technology and know-how. NFTs of MCH Heroes can also be used as Shin-cards in this game.

2. NFTs can be earned through gameplay!
Shin-cards, the NFTs of MCS, can be earned by accumulating “KP” through gameplay and “Evolve” them. Shin-cards are minted as NFTs on the blockchain, and can be owned and traded freely by users, as well as having special abilities and functions.

3. Adopting “Polygon”, an inexpensive, fast, and environmentally friendly blockchain!
MyCryptoSaga will use the blockchain “Polygon”, a scaling solution for Ethereum, to achieve low gas prices and high throughput while guaranteeing security by applying the sidechain technology Plasma. It is an environmentally friendly blockchain that uses PoS as the consensus algorithm and requires less than 1/1000 of the gas needed to generate NFTs as Ethereum.

About the Official Service of MCS

The official service of MCS will be released with further improvements and new contents added to the beta service version.
Anyone can start playing for free from a PC or Smartphone browser.
In addition, a dedicated application for smartphone has also been released.

<Official service start date>

May 31st, 2021: Site open from UTC 6:00 (KP battles will be held from UTC 12:00)

<How to access>

Access URL:
Download smartphone Apps
*These Apps for smartphones are provided at tokenPocket.

<Kami-card Sale>

Kami-cards Series 2: 10 kinds of individual cards, 3 attributes, and 10 kinds of packs
Payment: Credit card, Matic (Polygon’s native token)

About the Original Art NFTs Auction Sale

In commemoration of the release of the official service of MCS, we will be auctioning off the original art NFTs of Ryuji Noguchi, who created the art for this title, in two auction sites.
The original art NFTs to be sold in this auction are completely one-of-a-kind, and the winning bidder will receive 3 attributes Shin-cards (NFTs) with a serial number 1 based on the arts to be used in MCS.
The artist, Ryuji Nouguchi, has been involved in many game projects since the early days of computer games in the 80’s, and has designed almost all of the characters in this game and the previous game “My Crypto Heroes” as the art director.

<The first auction sale>

Auction site: OpenSea (URL:
Auction Period: May 31st, UTC 12:00 — June 3rd, UTC 12:00
Original Artwork: Nyame, Ammit, Salamanders, Kushinadahime, Bahamut (5 pieces)
Starting price: 0.1 ETH each

<Second Auction Sales>

Auction site: Nanakusa (URL:
Auction Period: June 3rd, UTC 12:00 — June 6th, UTC 12:00
Original Artwork: Jurojin, Izuna Gongen, Medusa, Krishna, Qilin (5 pieces)
Starting price: 0.1 ETH each

For more information about MCS, please visit the blog and Twitter below.
Official Twitter:
Official Discord:

(*Note 1) NFT stands for Non Fungible Token. It is a token on the blockchain issued under Ethereum’s ERC721 standard, etc., but it is not a crypto currency. By utilizing blockchain technology, it is possible to create digital data that proves authenticity, and the owner of the data can freely transfer it.
(*Note 2) According to Blockchain Game Info ( and DappRadar (

double Inc. company profile

Established on April 3, 2018 as a dedicated NFTS/blockchain game development company.

The company develops popular blockchain games such as “My Crypto Heroes” and “BRAVE FRONTIER HEROES”, and provides the blockchain game development support service “MCH+” and the NFT business support service “NFTPLUS”.

Company name: double Inc.
Location: 4–34–7 Nishi-Shinjuku, Shinjuku-ku, Tokyo, Japan
Representative: Hironobu Ueno (CEO)
Business description: Development, operation and sales of games and assets using blockchain technology
Home Page :

Inquiries regarding this matter: double inc. (
Email: Contact: Naohito Tamaya




double jump.tokyo株式会社のブログです。価値のあり方を変える”ブロックチェーン技術”を用いてゲームの未来をリビルドしたい。RE-BUILDING THE FUTURE OF GAMING WITH BLOCKCHAIN TECHNOLOGY!


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Project Manager at Inc.


double jump.tokyo株式会社のブログです。価値のあり方を変える”ブロックチェーン技術”を用いてゲームの未来をリビルドしたい。RE-BUILDING THE FUTURE OF GAMING WITH BLOCKCHAIN TECHNOLOGY!