If you control more than one creature with best in show, one of them becoming a target of a spell or ability you control (or a creature you control without best in show becoming such a target) will start a chain reaction
But that does open up entire forums worth of discussion
Having to pay life and mana for the extra card is a little rough but you don't have to add anything after the mill, making it a recurrable mill engine for reanimator decks, descent decks, self mill etc
The first being the Pharaoh's Tour Championship in December 2005 and the second being the Shonen Jump Championship
A great realtor could sell you on the Forgotten Cellar but on the other hand, creature tutors and gravediggers like Ramunap Excavator which suits more budgets, so weigh your pros and cons and send your down payment which should be less than $10
Zigzagoon will get its spotlight in team 19