Back then, Pokemon were lucky to have an ability that could impact the game at all, and even if they did, their stats or attacks would be subpar to balance the card
Leaf and Blue are also introduced in this set, and they are staple cards for some strategies that are trying to build a bigger board, as they improve the survivability of those decks
Angel's Grace Celestine Reef Cloudsteel Kirin Courageous Resolve Gideon of the Trials Herald of Eternal Dawn Lich's Mastery Liliana's Other Contract (double-faced)(playtest) Platinum Angel Platinum Angel Avatar The Book of Exalted Deeds
Wizards knew that they needed a simpler way to template cards with these abilities, and preferably one they could print at low mana costs without accidentally breaking every permanent with triggered abilities
Eevee Heads Everywhere Multiple cute Eevee faces, playfully surrounded by stars, hearts, lightning bolts, and Pok Balls
It even can win a game on its own in a pinch by animating a handful of lands to finish the job in a post-board-swept world