Designing a realistic MTG card involves more than just incorporating these exciting features
Breena, The Demagogue is a great card, encouraging your opponents to attack each other as that will let them draw a card and if they do that, you get to spread +1/+1 counters to a creature to slowly build up power on your side of the battlefield
Shadow is a 4/2 with haste and two major abilities
I could see someone trimming out the artifact ramp, going all in on Treasures, and picking more flavorful cards (like my aforementioned Balrog for Black Doom) to make it a story-driven Exhibition (1) deck or going more towards a true aristocrats strategy for an Upgraded (3) experience
1 An Offer You Can't Refuse
This card hasnt been reprinted since its first printing in the original Zendikar , and it really needed some more copies on the market