It is up there with behemoths of the trading card game industry such as the Pokemon Trading Card Game and YuGiOh. It has been running ever since 1993, making it the first-ever trading card game
Legolas, Master Archer's card doesn't say so, but it clearly works best with instants and sorceries, spells that often target individual creatures or two creatures at once
Tophs second ability lets you earthbend 2 at the end of your turn, turning a land or artifact into a 2/2 creature that comes right back to the battlefield if its destroyed
White isn't known for its free interaction, so Abolish is extremely likely to catch your opponents by surprise
Having the ability to give all your creatures trample for the turn is a great ability for Gruul decks, which tend to run high-power creatures
The only real downside is being mindful not to monopolize the game by taking a turn during everyone else turn, but as DJ Khaled says, that's just suffering from success