Yes, it does the mythic pack contains the Mythic ammo which is the MAX ammo throughout all the levels of the game(current and future). For now, that pack is for only LEVEL 0 and doesn't have all the weapons(level 0 laser gun only on WAX). But even without the laser gun, you can very easily beat the level at normal or hard(if skilled)

For the Hive users, NFT packs drop for the 2 other levels should be out between the 12 and 26 November(to be confirmed) ill leave a link to free to play mode