You can see the full breakdown of card styles and booster contents in Wizards blog post, but heres the quick summary: Draft boosters are your traditional packs of one rare or mythic, three uncommon, 10 common and one land card and are perfect for playing draft or sealed events
Either removing a threat or dealing substantial damage to a player, this ability is quite useful, especially when casting Omnath within an already established board state
These can be black cards, green cards, or green-black cards
In Simic Flash, Thryx essentially guarantees a resolved Nissa, Who Shakes the World either they counter your Thryx on their end step and leave their shields down, or it resolves and you get to cast an uncounterable Nissa
Quickly delivering your card is a priority for us, and we will be controlling the velocity of our AG program through price point to mitigate and prevent any operational impacts
Note a couple of things here