Intro
Swole Club comes around every three months or so, and is by far the easiest (free) way to earn mythic fragments. Basically, you have the ability to train you heroes up to the level they are in-game, gaining various boosts along the way that only affect Swole performance, and last until the end of the event. Swole rewards are given in milestone format, and increase in number the further you progress. Rewards include coins, stones, mythic fragments, and tokens for leveling up premium heroes like Gene, and Ricky Spanish. An advantage to the leveling system in Swole Club is that you have the option of selecting previous levels to gain training tokens if you get stuck.
Deck Build
The first thing you want to do is have your deck ready. We'll approach this a bit differently in Swole. I would still stick to the 25 card minimum, but work towards a deck comprised of a single show. The reason for this is that each show has at least one hero that boosts attack and health of every card from their native program. It's a lot more efficient to focus on boosting one show than to spread your training too thin with several. Feel free to include object cards from other shows because the character card is what determines the combo's show type, for example, Fry (Futurama)[Character] + Iraq Lobster (Family Guy)[Object] = Umbriel (Futurama). It would also be beneficial to focus on one or two specific combos in order to focus on particular traits.
Training
Apart from show type, traits can be boosted as well (punch, crazed, gas, etc). If you tap your hero's picture on the top-left of the main menu, it will show you your most used traits, kind of like a cheat sheet. Take note of which heroes will boost your most used traits and show. These will be included the first wave of training, which is to get 10 total heroes to level 2. This will give you a 100% boost per hero for all training tokens earned from level completion. Once you have 10 lvl 2s, Start focusing on your show's attack and health, along with the main three traits. To get the most training tokens per energy, be patient in allowing training to finish before burning more energy if possible. Slow and steady works wonders in this challenge.
Stuck?
If you run into a rough difficulty spike that you can't seem to beat, don't worry, it's just part of the challenge. The best thing to do is select an earlier level, as it will give you more tokens for completing the lower level as opposed to losing the current. Farm tokens for a bit to allow training to catch up with the difficulty. The important thing is to not get discouraged and keep at it.
The Big Payoff
The biggest draw for Swole Club is definitely the opportunity for a mythic card. My second Swole event was how I received my first mythic (Peter). Even if you're fairly new to the game, you can usually manage to collect at least half the fragments required for whichever mythic is up for grabs. About 95% of the time, the card we received fragments for will appear in the shop a day or two after Swole is over. Since we already have half, we won't need nearly as many gems to complete the mythic (6,400 as opposed to 12,900 starting from no fragments).
This is fucking intense. It's an actual training routine for a game. Nicely put together.