Based on the information provided, it seems that the amount of muscle someone can gain from using steroids can vary quite a bit. Generally, the consensus seems to be that a first-time steroid user could expect to gain around 20-30 pounds of muscle during their first cycle. More experienced steroid users may see gains of 10-15 pounds per cycle, with the potential for even larger gains of 30 pounds or more in some cases, especially with the use of potent compounds like Trenbolone. However, it's important to keep in mind that individual responses can vary greatly and that factors like training, nutrition, and genetics all play a significant role in determining the extent of muscle growth. The key takeaway is that steroids can indeed lead to substantial muscle gains, but the exact amount will depend on the individual user's circumstances.