Now that I have thought about it a few days, I think Solitude is clearly the better of the two, since it is not only a premium removal spell but also a viable win condition with its 3/2 body
No casting, which evades most counterspells, and the only limit to the number of times you can use it is the mana you produce
Back to Basics Market Price: $14.08 A blue enchantment that punishes nonbasic lands isnt the spiciest card from Urzas Saga , but the utility of its ability as well as its relative scarcity means that it retains a fairly high price point over 25 years after it was released
It also does these things quite badly
If you get this into play and protect it, victory is rarely more than a few turns out
Your first win grants 250 gold, while wins two through four each provide 100 gold