With a solid three strength and three willpower that will leave most characters banished or at least smarting, being able to instantly challenge can be a hugely effective way of shutting down a troublesome character on the other side of the table - especially if your opponent thinks theyll have at least a turn to respond to any characters you play before they have a chance to attack
Buy them as a gift, maybe as a way to supplement your collection
Top commanders: Impulse Draw Exile cards from the top of your library and play or cast them during a limited window, often this turn or until your next turn
Play with cards featuring the landfall and kicker mechanics, and get 3 Mythic Rares (including 2 Modal Double-Faced Cards), 21 Rares, 19 Uncommons (including 4 MDFCs), 16 Commons, and 16 Basic Land Cards
If you do, you can return a creature with power two or less from your graveyard to the battlefield, but now it is tapped and attacking
1 Goblin Diplomats