It uses loads of self-mill to put multi-typed cards in the graveyard, after which you can use your reanimation effects to bring back your game-enders
As more and more legendary cards continue to be printed, we should all keep an eye out for more cards like these
For one, there's already a monster version called Thunder Dragon Colossus
So far, we've seen Abomasnow with Vigor Link, which makes attacks cost one less energy, Magnezone and Raichu with Resiliance Link, which means the Pokemon take 30 less damage, Crobat with Cunning Link, which allows you to deal 30 damage to the opponents active Pokemon once per turn, Rotom and Heatran with Speed Link, which removes their retreat cost, and Tyranitar and Carnevine with Power Link, which buffs the Pokemon's attacks by 30 damage
It would also cause chaos for people who didnt want to give up their older cards, perhaps because of collector and sentimental reasons