His other two abilities are less impressive, but his +1 can help you do a ton of damage fast, and his ultimate -- while somewhat dependent on you having a board state -- can definitely win you the game
5 Fabled Hero Heroic has proven itself as a powerful ability in decks like Modern's Boros (Red/White) Feather, so it only makes sense a creature with both heroic and double strike is a force to be reckoned with
Context: Even known, Trix was one of the hardest decks to beat
4x Fossil Gastly 4x Base Haunter 4x Fossil Gengar 1x Base Jynx 1x Base Mewtwo 2x Base Pikachu 1x Jungle Pikachu 2x Base Raichu 1x Fossil Zapdos 1x Base Jigglypuff 1x GB Jigglypuff 1x Jungle Wigglytuff 1x Bill 1x Energy Removal 1x Pluspower 1x Switch 1x Gust of Wind 11x Lightning Energy 21x Psychic Energy Okay, in hindsight that's pretty bad
They represent various beings, from dinosaurs to trolls, and play a significant role in battles
Everyone knows about the Moxen cycle and Black Lotus, after all