Spoilers: https://www.magicspoiler.com/mtg-set/tarkir-dragonstorm/

What is Prerelease?: https://magic.wizards.com/en/play-events/prerelease

What is Two-Headed Giant?: https://magic.wizards.com/en/formats/two-headed-giant

What is Booster Draft?: https://magic.wizards.com/en/formats/booster-draft