That might not sound like a ton of fun, but in this card's defense, it rewards you for putting counters on stuff in a way that ends the game through trigger damage rather than forcing you to attack like some color combinations that don't have access to Red
Emchompite says that set symbols were discontinued starting with this series, and sets began using an abbreviation instead (which mirrors how sets are labeled in Japan)
June 2022: A special English set will be released
This version of the card is just a board-buff with Trample, but a newer version of that card, Overwhelming Stampede, has traumatized me a lot in my Commander pods
So having those in mind, Thievul is a Gen8 pokemon so if Nihilego (Gen 7) was on the set it would be after Malamar (Gen6) but before Nikit (Gen 8)
In addition, if you cast it this way, you may tap an untapped creature you control as an additional cost to cast that spell