As the game progresses, you learn their more powerful versions, such as Fira, Firaga, or Firaja
You could also go in a completely different direction and use Experimental Frenzy in service of cards like Kefnet
When you do, return target creature or land card from your graveyard to your hand
Meanwhile, I adore Into the Unknown. Not only is that a killer song from Frozen 2, its an excellent low-end removal tool that Sapphire/Amethyst really does need to keep up the pace, preventing foes from getting too far ahead before you have a chance to ramp up to your bigger plays
Its a shame that none of the Calamity Beasts jumped out at me as much as the animal citizens of Valley
If its Trainer gives it a set of Auspicious Armor, it will evolve into Amarouge