Sauron is a highly expensive commander at a mana value of eight
So, the main reason you make them attack each other is to keep yourself alive
My favourite products from the set were the 151 Binder, which will hold the vast majority of the cards from the set, and the Poster Collection, which I felt was great value
In this case, the sale also carried extra provenance because the PSA case was signed by original Charizard illustrator Mitsuhiro Arita and accompanied by authentication for the signature
Hilariously, it used to see play in the sideboards of mono-red Legacy goblin decks as a gotcha! card against Show and Tells trying to cheat in Emrakul, the Aeons Torn
That's what happens when you combine Tinker (which could get out the Jar almost immediately) with Megrim (so that your opponent would take 14 damage from a single Jar discard, assuming they could not play any cards in time)