The the win condition for this is either a self mill or unstoppable 5/5+ creatures with trample.

With 8(12 with FB) copy cards, Cryptoplasm and Cackling Counterpart, there are easily 4-6 Splinterfrieghts on the board from early on which mill 2 cards each every turn. The copy cards also make effective Lab Maniac body doubles to keep the win condition. Jace is candy to speed up the self mill process or used well with Forbidden Alchemy to find the missing combo cards. Forbidden Alchemy doubles as a graveyard filler to keep Splinterfrights and Boneyard Worms alive, Boneyards can be cast with an empty graveyard to give Splinters the 1/1 in a pinch Silent helps with early onslaught.