Karn, Legacy Reforged The MTG artifact creature that artifact creatures love best, Karn, Legacy Reforged is great whether you're going wide with lots of little artifacts and tokens or tall with a few massive ones
The strategy revolves around borrowing creatures and spells from your opponents and using them to your advantage
Diregraf Rebirth is a five cost spell that recurs one dork from your graveyard to your battlefield and can be flashed back for another go around the bin
While you won't get the annihilator trigger off of Emrakul, the Aeons Torn, you'll still be attacking with 15 power in the air, and the Emrakul will go back to your hand afterward, to attack again if your opponent happens to survive
In decks full of high mana value bombs or utility pieces, those extra cards add up fastand protecting your board is always a welcome bonus
Of course, none of the removal spells I mentioned in the last two items are as powerful as the most played Rakdos card in EDH, Terminate