Legends of Runeterra - Hard Counters

What are hard counters, why do they matter and when do they transcend being a meme to become the top decks in a format.
Using the real life example of 80% winrate frostbite Temo.

[@peepo3376]

Nice vid! Hey, I know you specialize in Eternal format but could you help me build a standard deck that include Secret Keeper and Kingfisher? Doesn't need to be competitive, I know it's a meme, I just want to refine it a bit as I struggle with how to direct the deck (for example I wondered if I should run some champions I can pull with Ambassador or should just omit them to guarantee a lv2 champ after keeper. If I should swap Defenders of the sun disc for stronger blockers and so on). CMCACBIHCYAQOBYSAEEAGDAGAQDQCEA4EZEGMAQBBAABMAIIA4CQIAIGA4SACBYHBUAQQCIDAYCAOAYUF45T4SI

[@EternalKing-LegendsOfRuneterra]

I got you, pretend to be a normal dragon deck so you can actually compete with the big boys, you just run secret keeper and boat for rally and draw. CMEACBAACQAQIBYUAECQADYBA4AAKAIHA4JACCAHBYBQGAACBAFQGCAABIGRMAADAEBQABQBAQDTWAQEAAHBA Don't forget to slam horned swarm caller to remove Eddy boons like deathless so your dragons trade even.

[@peepo3376]

Yeah, this is much more functional. I got tunneled vision by the champion meme that I tried to built too much around it when secret keeper already suffice. Thanks.