The real importance of the card comes from its ability to create 1/1 Sliver tokens for just five mana
The only thing you have to watch out for is having enough black mana producing lands to cast Darkblast multiple times in a single turn
These two decks are working toward two very different goals, and yet both will run Bebe's Search, Roseanne's Research, and Luxury Ball, often in the same quantity (though in this example, Kingdra will typically run more Luxury Ball than Flygon) because both decks need to get Pokemon and energy into play in order to function
Now this card is also a Titan and there is support for a Titan tribal deck this set, but I don't expect that deck to be very good
The card is extremely rare because it was only given to winners of an art contest in Japan back in 1998
If you can prove how a given card came into your position, from where, and why