Not only is it a very strong card, but it only costs 1 white mana, meaning it can easily be played at turn 1 and stay active for an entire game
You see, when you attack with Ghalta and Mavren out, you get two options to choose from as an attack trigger
The combination of healing, drawing cards, and being able to quest for two lore makes her an extremely flexible mid-game card that has value in any amber-based archetype
Spending 2 loyalty will allow you to turn any creature into a treasure artifact, which is a very fun way of removing a threat or converting a useless creature on your side of the field
This means I can immediately use its big stats to my advantage by attacking the turn it enters
Then you can go one by one looking for damage to the cards