Sitting at a hefty nine generic mana, Darksteel Forge grants all artifacts, itself included, indestructible as long as its in play
I run Exquisite Blood and Sanguine Bond in my Edgar Markov deck
It sounds simple, but because there are few restrictions on who, or what, you can damage, it allows you to target cards that are Evasive, cards that aren't exerted, and, really, any card with willpower
You can also sacrifice Knights of San d'Oria/Ranger-Captain of Eos to prevent your opponents from casting noncreature spells on this turn
Time Walk was an iconic and expensive card at the time it was banned, and removing it from the card pool was intended to combat the notion that Commander is a prohibitively expensive and inaccessible format
Im already looking forward to using some of them on my opponents