It also introduced new mechanics that allowed players to develop deeper and more complex strategies
In the incredibly rare case where, during your cleanup step, Ancient Adamantoise is phased out with damage marked on it, Ancient Adamantoise's second ability won't apply and all marked damage will be removed from it during that cleanup step
Of course, it does have the big drawback of letting your opponent draw 2, but situationally this isnt the worst see Prince Johns Mirror below
Priority support, exclusive features, and early access to new functionality.
Theres card draw and pressure, but more importantly, Yshtola works as a powerful value engine once you stack it with auras like Curiosity and Sigil of Sleep
The cost reduction applies only to generic mana in the total cost of noncreature spells you cast