There are plenty of big creatures that only need one turn to have a serious impact on the game, but if you want your unearthed creatures to stick around you can also include cards like Obeka, Brute Chronologist and Sundial of the Infinite
You can set up extra turn loops with the right tools or use cards like Brainstorm to manipulate your topdeck and just get extra value from Kefnet along the way
If the spell or ability that caused you to roll a die includes any effects due to the result, resolve those effects before putting Dee Kay's triggered abilities on the stack
Gaining control of an opponents card (stealing!) Removing cards from the game entirely - not just putting them into the graveyard
Having peeked at the Bant options, however, I can tell you that they're a lot subtler, on the whole
Being able to move those key elements from one format to the other can be challenging, but Wizards of the Coast has put a lot of work into ensuring this is a seamless transition
