The only type you have more than one of is Vampire, and that's not the type you really want to be defending with the uncounterable ability
Black Lotus, The Moxen, and Ragavan are prime examples, as they provide an overwhelming resource or tempo advantage from the very first turn
Overlord Cycle Each 'biome' of Duskmourn has an Overlord, an Avatar Horror with Impending, which enters as an enchantment, and doesn't become a creature until its last time counter is removed
As for the plane itself, theres a little to work with in Orzhov both for enchantment and lifegain synergies, although neither are naturally prominent in this precon
Whatever it is, it will be nonfoil
The phrase 'fetch land' refers to a non-basic MTG Land card that can be sacrificed to search your library for a specific land