On its own it is nothing, but there are a ton of ways for it to prove worthwhile and it got so bad that Wizards was forced to strike it down in some formats rather than ban other cards that served a more balanced purpose
Sacrifice synergies abound with cards like Bag of Devouring, Mayhem Devil, and Juri, Master of the Revue
So, depending on the match-up, Donalds Date can easily start wreaking havoc on any deck that has a good amount of actions, items, or locations in the roster
If they did, well good news for you as they burned some removal on their own creature and lost two life for it
These effects are designed to end games quickly
Although other decks have strategies that can counter Amber/Amethyst play, the level of strategy necessary to do so is often higher