The Topsun website patent registration confirms 1997 as the release year and contradicts earlier claims of a 1995 date
If there is a specific card you want for you collection, you can search the in-game marketplace for it or post an ad offering a trade
In order to activate this ability, tap one basic land of any color (that's for the 1 generic mana), as well as one Plains (that's for the one white mana)
Karazikar is another all-star for us, as it triggers Valgavoth while pushing damage elsewhere and drawing us even more cards
Terra, Magical Adept / Esper Terra Terra, Magical Adept, discounting the transformed side, is already a good 4/2 creature that mills and gives you a little value
These cards, for many years at least, became somewhat of an amusing oddity for collectors, but as printing errors continue, some have become less amused