lorcana cards most valuable The 10 Expensive Whispers in the Well — Joseph Writer Anderson The Most Valuable Enchanted Rares

There are plenty of those in this deck

While the life loss and gain synergy provides incremental advantage, there are better cards with similar effects, such as Zulaport Cutthroat or Blood Artist, which have lower mana costs and provide more immediate impact

Mondrak, Glory Dominus's ability to double any token that's created under your control justifies the high price, but it becomes an even more fiscally sound investment when it gives itself an indestructible counter to become an unmovable threat

Notably if you can get this creature onto the battlefield without casting it, for example reanimating it from your graveyard, you wont have to sacrifice a creature