You could make the argument that Night's Whisper and Opt are good enough for my cube - and I will likely agree with you.
But the problem I have with cards like this is they don't really add any value and feels like playing a Pendelhaven/ Great Furance/ Flagstone of Torkir.
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I'm actively maintaining a comprehensive article to help explain to new cube players how some complex vintage level cards work in a cube environment. Vintage Cube Cards Explained
But the problem I have with cards like this is they don't really add any value and feels like playing a Pendelhaven/ Great Furance/ Flagstone of Torkir.
Vintage Cube Cards Explained
Here are some other articles I've written about fine tuning your cube:
1. Minimum Archetype Support
2. Improving Green Archetypes
3. Improving White Archetypes
4. Matchup Analysis
5. Cube Combos (Work in Progress)
Draft my Cube - https://cubecobra.com/cube/overview/d8i