Sadly, outside of this super staple in Commander, prices fall off pretty fast
Originally released in Portal Three Kingdoms , it took nearly 20 years for it to become widely accessible in Masters 25 , and you can get copies now for just a few dollars thanks to the additional printings it has had since
This means that when they deal combat damage to a player if they aren't renowned, you put a +1/+1 counter on them, and they become renowned
All 10(ish) prints of Gifts Ungiven should be considered Commander staples going forward
Some cards represent a collection of similar creatures, or a creature who summons lesser underlings as part of their abilities
Tutors are great even outside that combo though because they get what we need at the moment