That's a more viable strategy against Burn, Twin, and Abzan, but that's because these decks have such sizable metagame shares
The Mythical Pokmon Mew holds many secrets of the Pokmon world, and usually only the luckiest of Trainers encounter it
Cards like Maleficent Monstrous Dragon deliver devastating banishes, while Elsa Spirit of Winter can freeze threats, buying time for your team to quest safely
Put a +1/+1 counter on that creature for each 1 damage prevented this way. Basically, you can just keep turning your Creatures sideways, and theyre going to keep getting bigger, and thats impossible to argue with
Although most monster effects in the current meta game are on a once-per-turn basis, there are some powerful monsters out there who wont hesitate to activate 5 times in a turn and ruin your day
Crystals are gained by, er, levelling up, completing quests, and reaching Battle Pass tiers