"Mill" is a colloquial term that originates from the card Millstone, used here to mean "putting the top cards of a player's library into his or her graveyard." For example, you could say, "In the finals of the Pro Tour Qualifier, Herbert cast Tome Scour to mill away my final five cards, dashing my chances of playing on the Pro Tour." There are many players who will play with Tome Scour in their decks
Storm, Force of Nature is a storm commander, one that wants you to cast as many spells as possible before winning the game off of one spell
Combos and Interactions This isnt a combo-heavy deck
Because its an artifact, it slots into nearly any deck, and its mana cost puts it in a fun place in your Birthing Pod / Prime Speaker Vannifar chain
Lier, Disciple of the Drowned Do I need to explain