I theorize this from the context of the time and the design of the card game itself: Trainer Cards were Extremely Overpowered Imagine playing a modern day Supporter Cards, which you can only play one of them per turn, in the days when there was no such thing as a Supporter - That is, if you played Supporters like they were Item Cards, which you can play as many as you'd like on your turn
Its very easy for Land Tax to be a draw-9 or draw-12 throughout a game, and its one of the few cards that contributes to deck-thinning in a meaningful way
Its pre-1st Edition, and it has a blue back that resembles that of a playing card
Komainu Battle Armor Komainu Battle Armor is an interesting, ahem , artifact creature equipment dog
Another site that can be used for raw cards, but much better for graded cards is PriceCharting
There are plenty of Dinosaurs to choose from to strengthen your deck