Over the years, WotC has developed and produced a few different types of foil treatments
There are often sales on booster packs, so be sure to keep an eye out for them
In fact, why not run both
However, it doesn't make sense that this lightning scaredy-cat still carries lighting gems and marbles then physically throws them at enemies
The 5-sentence Commander game plan I win by: (combat damage, combo, commander damage, drain, lock, alt win, etc.) I get there by: (tokens, value engine, graveyard loop, spellslinger, stax, big mana, etc.) My commanders job is: (engine, payoff, tutor, glue, finisher, or distraction) My backup plan is: (what you do when the main thing gets hated out) My biggest problem is: (fast decks, wipes, grave hate, counterspells, artifacts, etc.) If you cant fill this in, do not buy more cards
This means approximately 1 in 36 boosters contains a traditional foil Booster Fun rare or mythic rare