Its great in +1/+1 counter decks with cards like Luminarch Aspirant and Cathars' Crusade
Weve seen multiple types of unique counters placed on players: poison, energy, experience
(Question Elemental) Elves (Elvish Impersonators) Gus (Gus) Lady of Proper Etiquette (Miss Demeanor) Lobster (Rock Lobster) (originally printed without the creature type, but added in Oracle, and later versions of the card)
We're excited to see these after the successful design behind both the Warhammer 40,000 decks and the Doctor Who decks
If Simisear, a Fire-type, uses Flame Burst, a Fire-type move, against a Grass and Bug-type pokmon, it deals 6x damage
Later, you also get a single shot at the mode to make a 4/4 flying Dinosaur Dragon, so it plays more like two big one-time boosts than an engine you spam every turn