Onslaught Block marked the end of many traditional elements of Magic: The Gathering
Like most Magic: The Gathering cards, the value of Silvos, Rogue Elemental depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Onslaught)
Let's walk through the major choices: Standard Discard (sample: Mind Rot) I play an instant or sorcery (mostly a sorcery but we'll get to that in a bit)
Unsurprisingly, Nowhere to Run is all over Standard right now
In Magic terms, Absolute Virtue gives you protection from all opponents, which means you can't be affected by anything they control until they defeat it
With any luck, a white removal spell will join the fray and we will be off to the races!