Karmic Guides enter trigger being a no-strings attached Reanimate allows for some heavenly graveyard lines
A Food token is a colorless artifact token with "2, T, Sacrifice this artifact: You gain 3 life." Eating, er
Although this effect does have a practical purpose within the game, it ultimately served moreso to just annoy your opponents, which is ultimately what lead to the card being completely banned
The biggest benefit to this is that Mewtwo ex is very quick and easy to set up due to being a basic Pokemon, and can even be sought out through the addition of cards such as Poke Ball
It also makes for a serviceable blocker, often mitigating some damage while you develop your board
If The Ur-Dragon at least makes it to your combat step, you're going to be throwing a game-ending amount of power into play for free