Fiery Temper is best played in decks that are built around casting various madness spells
Pokmon in Japan would eventually breed multiple manga and anime, a trading card game, and all manner of merchandise
Dimir (Blue-Black) Glimpse the Unthinkable from Ravnica Every time we've designed a Dimir mechanic, we've been tempted to build it around milling (putting cards directly from a player's library into their graveyard)
Technically they existed all the way back in Arabian Nights, on the titular Desert land, but it was a full 24 years before the sandy wastelands were revisited as a fleshed-out card type
And Rising Waters got a lot of play when it arrived as well, in similar reasons
In my opinion, what the LCS offers is a way to bring you closer to sports or a specific team, in a way that you can customize as you see fit