It can be used to protect your board and life total while giving another opponent an extra turn, potentially making them a target for the next turn
Beverly Crusher Brad Boimler, Eager Ensign Trelane, Squire of Gothos Spock, Logical Choice Hoshi Sato, Exolinguist Highly Illogical Consider the Prime Directive Sheoldred, the Apocalypse Borg Queen, Perfection Manifest Bio-Asset Allocator Salt Vampire In the Pale Moonlight Munitions Enthusiast Burst Lightning Klingon Strike Force Kirk, Enterprising Captain Captain James T
both of them start in the command zone, and the color identity of the rest of the cards in your deck are determined by the color(s) of your common creature commander and the legendary Equipment
Finally, I've put in a few other cards to squeeze even more value out of the deck
In Magic: The Gathering's latest set, The Brothers' War, we get a reprint of a commonly seen card Disfigure