disliker of the mary sue
can you explain each format?
Booster Draft is 8 people sit around a table. then each person is given 3 boosters. opens one, picks one card from it (boosters have 15 cards) then passes the booster to the left, and repeats process until all cards are picked, then repeats the process with a new booster passing to the left, then the last booster is to the right again. (that's the deck card pool.)
Sealed is a tournament pack. (5 of each basic land type + 45 additional cards with 3 rares) and 3 boosters, no trading around, but the cards in the packs are the card pool.
Tournament standard is basic magic, 20 life, 7 cards, get rid of the opponents deck or life through any means. (there's also Type 1.0 Type 1.5 and Type 2.0 the only differences between these three formats is what cards are banned or restricted.)
Elder Dragon Highlander is 100 cards minimum, and excluding basic land, no duplicate cards. one card must be legendary, and has to be all the colors that your deck is. a deck legend is always considered in the hand, and if the legend is removed from play at any time it gains a counter which counts as 2 additional colorless mana in it's mana cost. Starting life is 40, if the deck legend deals 21 or more damage, you lose.
Rainbow is 250, 50 life. the deck needs to have at least 30 cards of each color. all other rules follow tournament standard except for a few banned cards.
All of the formats have slightly different banned and restricted cardpools.