I would much rather have the consistency of the other cards giving a static discount, as you aren't guaranteed to be playing against anyone with counters to remove
Rounding things out, though it isnt an attack trigger, this is definitely an Akromas Will deck
All you need is a sorcery, maybe even a second copy of Startled Awake (great title)
Klefki's attack is also useful, as it might only do 10 damage, but it also removes tools that are attached to the opponent's Pokmon
What about normal cycling costs
The choice of these specific FINAL FANTASY titles, VI, VII, X, and XIV, appears to be a thoughtful approach, aiming to resonate with a wide spectrum of the FINAL FANTASY fanbase, from those who grew up with classic 16-bit adventures to players currently exploring vast online worlds