For control style decks, you get to disrupt whatever plans your opponent was depending on and as a bonus, you can make sure your next draw can also ruin their next play
You pay 1 life, but the payoff is flexibilityyou can either stack a +1/+1 counter on it to grow taller, or create a spirit token with endure
By having Dark Sanctuary on the field, you are now able to summon your letters as monsters, which comes with, guess what, even more weird rulings
If we use the search terms graveyard instead of dies, we also find [Card]Boggart Shenanigans[/Card] and [Card]Goblin Sharpshooter[/Card]
Value Potential: Some cards can be quite valuable, making booster pack openings not just a fun activity but also a potential investment