You can obtain the Passimian (1-Diamond rarity) card by opening Extradimensional Crisis from Extradimensional Crisis set
Apparently, the weapons, and only the weapons, will also appear in the main Murders at Karlov Manor set as real Standard-legal Magic cards, so you can equip creatures with a Rope, Knife, or Lead Pipe - all the classic Clue weapons
It's very rare that I care about the life gain, but it's there if I need it
I could trade for even more sweet cards for one, and really did I need more than one now that we had Sliver Overlord that could search for your Sliver Queen
Whether you are able to search for the card you need directly or have to search for a source of draw power, these cards can be just as powerful and strong as a draw Supporter itself
When mixed in with commander damage, this makes your Commander able to take someone out of the game quickly