Green/Blue (20% aggro) Before you freak out, please keep in mind that by aggro I dont mean midrange
You should support this plan with some stax pieces like Blood Moon and Soulless Jailer to slow down your opponents while accelerating your gameplan with reds mana production, typically through Treasure cards or rituals
It is worth noting that these spells are also fairly big threats against 5 color decks running a lot of original dual lands, shocklands, and triomes too, as the lands they destroy dont have to be basics they only need to have the basic land type in question
One slot in a booster pack is set at Rare or higher, so in theory you should get one Rare per booster, but Super Rare and higher cards are much scarcer
The machine told me a way to politely pull the card image data from Scryfall, which took a bit over 3 hours