Izzet loot would be fun especially if you were grabbing treasures at the same time
Setting SUICIDE aside as a viable strategy for multiplayer (Although it works wonderfully if you can convince your opponents to play it The Ferrett), the other three have cards all designed to deal with multiple opponents
This plays perfectly with Admiral Brass, Unsinkable, the commander of the deck Skeleton Crew was originally printed in
Artifact Ward is great to play not just on your board but it can severely hinder your opponents Voltron plan check out our Voltron video on YouTube by the way by preventing them from putting any equipment on their Balan, Wandering Knight or Wyleth, Soul of Steel since the equip ability reads Attach to target creature you control
Its a great New Capenna card, but the arguments and chaos itll cause when you play it wont be worth it unless thats specifically your aim with your deck
The Un-Sets refer to a collection of silver-bordered sets that all start with Un (Unstable, Unglued, etc.)