Aristocrat decks thrive on sacrificing creatures, so each time a creature dies, every card you own that cares about creatures dying triggers twice including the death trigger of the creature that died
This card has been used since the beginning and has moved in and out of relevance over the years and has plenty of cards that support and search it
This I imagine is the same reason the copyright on the 1999 Japanese Pokmon Gold and Silver Game Boy Color games only includes Nintendo, Creatures and Gamefeak
Like Kaho, hes a blue, 4-mana creature, and like Isochron Scepter, he lets you virtually imprint an instant and cast it turn after turn
Ward usually shows up on between 5-10 cards per Standard Magic set, sometimes even more frequently
That could be necessary for giving the game some longevity once the initial lure of pure collecting wears off