In Roblox, the rarity of obtaining a specific skin or item from a crate typically depends on the game's mechanics and the developer's settings. The "Strongest in History" skin may have a designated drop rate that could be classified as common, uncommon, rare, or extremely rare.
If you want to know the exact rarity, you would need to consult the game's official documentation, community forums, or fan sites where players might have shared their experiences and statistics. Often, developers will provide explicit details about drop rates for specific items, or the community may have conducted studies to estimate these rates.
If the game does not disclose the drop rates, it might be challenging to determine how rare the specific skin is without anecdotal evidence from the player base. If you have further questions or need assistance with something specific in Roblox, feel free to ask!