A couple of standard d6 dice or a set of dedicated TCG counter dice (often sold in packs) is inexpensive and very useful
Looking at the history of Energy decks across formats highlights the mechanic's unique ability to provide both enablers and payoffs that can be equal parts powerful, unpredictable, and perhaps for game designers, difficult to balance
dragon BWR with thunder wings, up from $330
Their Synchro monsters range in levels from 5 to 10, and they even received their own Link monster as part of their legacy support in the Vrains era
Better still, Magic also released a Zombie token in the same Final Fantasy Commander deck that mimics Hildibrand's pose on his own card
Remember, investing in a booster box is not just about the cards