Getting to dig for an artifact or enchantment and bringing it in with a shield counter is nice, and similarly, putting perma-buffs on your creatures or Commander is good too
Plus, every time your dragons deal damage, you get to dig through your deck and even bounce dragons back to your hand to dodge removal or retrigger enter-the-battlefield effects
Lets go over some exclusions first
Creatures with power 2 or less have seen lots of support recently, with cards like Delney, Streetwise Lookout and Assemble the Players
You can play it in a deck with its partner, which is a black creature (Krav, the Unredeemed) that gives you more of an aristocrats deck configuration
Then you take control of combat on key turns in which the table would rally against your goad commander with a sacrifice outlet and pop off a Not Dead After All type of card to bring Kardur's ability up again