NOTE #2 : I define the free spells as "spells found in the Urza's Saga block that when played untap a number of lands equal to the spell's converted mana cost"
The Un-sets using the silver border conventions were Unglued back in 1998, followed by Unhinged in 2004, Unstable in 2017, and Unsanctioned in 2020
A lot of players have some pretty powerful cards
Depending on the list this can completely shut off artifact and enchantment removal, value engines, win conditions

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I don't have time to do that weekly and kind of overpaid for the boxes I bought so I'm looking to get part of what I paid back for them after I went through trying to fill buy lists