This is an aggressive deck with combo synergies, that result in either decking your opponent or killing them with large units (sometimes both at the same time). The primary combo is
Tome of Horrors combined with
Preyscouter, which allows units to consistently grow in size.
Moldermuck benefits the most impressively from this, growing ever larger with each iteration;
Maveloft Huntress and
Direwood Pack also become quite powerful with Preyscouter.
Another combo is resolving multiple copies of
Tome of Horrors, and hitting with large creatures such as
Direwood Pack. This will net wins through stalled board states quite often.
Units such as
Grenahen and
Elding of the Final Hour are flex spots at the moment; I've liked Elding so far, but I'm not extremely attached to Grenahen.
The market is there for general utility.
Elvish Swindler is there to help get the engine going in a pinch, and
Solitude provides an alternate win condition in certain stalled boardstates.