When someone attacks with a non-artifact creature you can destroy (without regenerate), targeted attacker
The digital game will play out exactly in the same way save for the random mechanic that will take the place of real-world card shuffling
Doomsday Doomsday is the weirdest card here, but its a powerful one-card combo
Horde of Notions, notably originally printed in Lorwyn, isnt an incredibly powerful Commander by any means, but it does give five-colored Elementals a home
They build a decklist on paper and then buy the individual cards either from a game store, or a website like TCGPlayer
Scavengers Talent Scavenger's Talent has more going on than just self-mill, but sacrifice decks and self-mill decks often overlap in how they use the graveyard