Overwhelming Difference of Power (TWS-060 N) [The War of the Suns]

[Quickast] Destroy target non-magic stone entity with total cost X or less, where X is the number of times you already played a card named "The Sword of Progression" this game. [Mastery] "Ulga, Eclipser" (You may rest a recovered card named "Ulga, Eclipser" you control rather than pay this card's cost.)