So for those who don’t play this cursed game, first of all you are correct run away this game is brain rot. But the rule there for “haste” is what’s known as a key word. These are common rules bundled into an easy to remember word to save space on the card.
Haste is one of those key words. It gets printed on starter products, but for over a decade now cards like Shadowfax here don’t include it because it’s assume you know what it means.
But it is printed on Shadowfax. Why?
Because Shadowfax shows us the meaning of haste.