By phasing everything out, you'll dodge all the spells and abilities that could set your game back, and protect yourself from lethal damage for one turn
With some of this versatility, however, the current version of Ruby/Amethyst does lose out on some advantages
The closest and generally stronger alternative is Remembrance, which can shuffle back any three differently named cards rather than only attack reactions, although it costs 3 resources, so Lessons Learned can be preferable when you specifically need cheap reaction recursion and blue pitch
This presents a high-risk, high-reward scenario that requires careful consideration and strategic planning
Who knows what it will sell for were he to ever sell it, as collector items like these really embody the its worth whatever someone is willing to pay mantra
This lets you win with all manner of payoffs, from Blood Artist to Thassas Oracle