Most of the best candidates in my mind are individual creatures which convert accumulated resources (be they cards, treasures, or creatures in play) into direct damage to players
Omnath really loves lands, so team them up with anything that lets you play extra lands, plus other permanents with Landfall triggers, and its not hard to go-off, gaining an insurmountable value and mana advantage
If you have cards in your hand that wont be useful in the next couple of turns, you can cast Brainstorm, put the cards you dont want on the top of your library, and then fetch a land
This meant that there were 4 total tournaments ran, resulting a total of 4 copies of each No.1-3 trainer card
You can Tribute this card with 3 Spell Counters on it
The Pokemon Trading Card Game made its North American debut in 1999, and quickly became a cultural phenomena just like the Nintendo RPG