While Terapagos' first SIR is likely to hold value over time, it's worth keeping an eye on the co-stars of the set in Squirtle and Bulbasaur, as Kanto nostalgia is always strong
If it's turned face up in any other way than paying its negamorph cost, you won't put a -1/-1 counter on it
TableTop Simulator is another way where you can experience a more physical card game experience, getting to freely move the cards around without the game automatically doing it for you
All said and done it is still a situational card and often a very poor rip off the top meaning you can't just throw this into a deck without thought and not have it cost you
The graphic they added to the Mystery Booster packs had a square background, and the one they used for The List seems to have a rounded background, which creates a telltale difference in the shape of the cards border as you can see on Chatter of the Squirrel and Ancient Den as well as subtle changes in its placement on new border cards, as seen on Boros Challenger
The entire design of this card is very Rakdos, and it's one of Magic's best Food cards