So, the question is, are Treasures the problem, or is this the fault of the designers who keep on pushing the mechanic straight past 'fair' to 'unbelievably broken'
Omniscience Omniscience is expensive at 10 mana, but once you get this card into play, the game is probably over
According to EDHREC: Sliver TBA (See below) - 273 decks Sliver Legion - 54 decks The First Sliver - 1555 decks Sliver Hivelord - 446 decks Sliver Overlord - 1556 decks Lots of Sliver love
We'll now have the opportunity to find out, as this long-clamoured-for card - the original, eponymous counterspell - is being injected into the format
Meddling Mage To start, people should just be playing Humans more
For most formats, there is no maximum limit on the number of cards you can have in your deck