It's plain cool to see a Sliver precon deck, period, but Sliver Swarm, revealed this week, doesn't seem to know it's part of a premium product and priced at $80 - twice the usual cost
Surge Conductor, on the other hand, is the absolute perfect card for Insight Engine, so long as theres enough other artifact support in your Commander deck
Still, many of these cards are relevant for formats ranging from the competitive Modern format to the Commander format or even Legacy and Vintage, making them relevant even if they aren't terribly valuable financially
(2023-11-10) If you control a creature that is both a Fungus and a Saproling, it counts only once for The Mycotyrant's middle ability
You're not locked in, either
Its synergies with Dragons are tangential at best