The HMS 5 Saint Beasts Booster is a Limited Booster pack released in Japan on November 6, 2004 by Takara Tomy.
Similar to the Random Booster packs of Generation 1, the HMS 5 Saint Beasts Booster was a limited edition booster pack release that featured a set of special edition, "Limited Proto Grey" (Japanese: 限定プロトグレー) variants of the A-123 Beyblade Gaia Dragoon MS, A-124 Beyblade Driger MS, A-125 Beyblade Draciel MS, A-131 Beyblade Dranzer MS, and MA-01 Beyblade Dragoon MS Ultimate Version Beyblades. All Beyblades featured in this set were manufactured with the same, quality materials as their regular retail counterparts and all came included with sticker decal sheets from their original counterparts. However, the plastic materials used was a "Proto Grey" colored, acrylonitrile butadiene styrene (ABS) material. Aside from their alternate color, the Beys featured in this set performed no different from their regular counterparts.
Aside from the Beys mentioned earlier, this booster set also featured the "Limited Original Color Version" (Japanese: 限定オリジナルカラーバージョン) of the MA-08 Beyblade Wolborg MS as the "Secret Model" (Japanese: シークレットモデル) Beyblade top. Unlike the other featured Beys of this set, the plastic material used for this alternate color Bey was ice-blue-colored ABS plastic and comes included with sticker decals in a different color palette than what was included with the regular Wolborg MS.
Due to its nature and contents, the relative reception of this item is unknown. International buyers were able to purchase this booster pack using the the internet and from specialty hobby stores in their country. Nevertheless, buyers had the 1/6 chance of acquiring any of the advertised Beyblades. It's unknown how many of these rare [Wolborg MS] Beyblades were produced, but as of 2020, find one for sale is unlikely and if so, buyers can expect to pay an exorbitant amount.
- "Proto Grey" may be a possible reference to the color of prototype Beyblade models.