Bello, Bard of the Brambles is a great commander, and the secondary commander Wildsear, Scouring Maw is great too if you want to shift to a more enchantment focus as opposed to straight combat
His enter the battlefield trigger hits cards in the hand, his attack trigger affects the library directly and his dies trigger will remove half the permanents from one unlucky opponent's battlefield
Both of these commanders are excellent at flooding the board with creatures and raising their power through Virtuous Role tokens or +1/+1 counters to enable Kutzils card draw
If you want to play this card Id suggest adding a copy of each to your mainboard
Like most Magic: The Gathering cards, the value of Conspiracy 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 (The List)