Usually, sets are started and completed in the same set or block
(While it's phased out, it's treated as though it doesn't exist
Every card in your deck must only use mana symbols that appear on your commander
For example, if it blocks a 12/12 creature with trample, that creature's controller must assign at least 8 of that creature's combat damage to Diamond Weapon, and the remainder can be assigned to the defending player, planeswalker, or battle
The Great Forest enjoys creatures with higher toughnesses, such as Silklash Spider and shuts down the opposite, like Zurgo Helmsmasher
Tarrians Journal / The Tomb of Aclazotz Being locked at sorcery speed makes Tarrian's Journal remarkably unexciting, even though the rate on the card draws quite reasonable