How to go about doing 35 Buddhas Confession?

So what are the Four Opponent Powers?

From Master Ri-Chang’s Lamrim Commentary Track 62B, we get:

What are the four? They are the power of eradication; the power of applying remedies; the power of turning away from faults; and the power of the foundation.
【何等为四?谓能破坏现行,对治现行,遮止罪恶及依止力。”】

Also, another contributor in this forum gave an explanation too:

Good stuff!