Ratadrabik of Urborg is a great choice if Zombies will be attacking, and also to get more copies of legendary creatures like Sliver Gravemother
His evaluations have starkly differed from mine on several cards, and while Ill always defer to him as a better and more accomplished player than I, its nevertheless fun for me to compare my rationales with his
As long as it was in the format, it was played, and it was a core card in some turn-one decks that would just knock out your only Pokemon in play to win the game on the first turn
Just like the show, however, some of the synergies are just way too disjointed from each other, like the plot between seasons, to consistently win your games, unless you are a Time Lord and can manipulate the deck to its limits
As a phenomenally popular collectable game, its no surprise that Pokemon has given us some rare, and so valuable cards over the years