There are many ways to make this card become a huge threat, like Arcades, the Strategist, Doran, the Siege Tower, and Bedrock Tortoise
In Pokemon TCG Pocket, a good rule of thumb to follow is to have a Pokemon that can strike at your opponent in the early game and one that you're setting up on the Bench that will be your main hitter
The design of the creature is just as baffling as the name of the card, making for one of Magic's most confusing cards as a whole
If you can make a lot of tokens (say, Mites), Flesh-Eater Imp can become as big as an Eldrazi- an Eldrazi that can instantly end the game for someone
Compare that to popular Elves like Yeva, Nature's Herald (4983), Timberwatch Elf (1689), Ezuri, Renegade Leader (2019), and Edric, Spymaster of Trest (4362)
Searching out the Hexamage allows you to immediately turn the battle into Zilortha, Apex of Ikoria