While the card-draw spell did not make it into any competitive Cascade-list, Crashing Footfalls became the namesake card of a Tier 1 Modern deck, Temur Rhinos
Kefka could even have a double-faced card, with one side representing his relatively mundane human villainy and the other showing him in his destructive god form
However, the problem with this is that, if you spend the action on Righteous Hunt to move and engage an enemy, and then another action to evade, you have only a single action in your turn remaining to take advantage of the fact you've exhausted the enemy
The rainbow foil versions typically have a higher price point
Even when youre selling a mixed lot or bulk collection, grading your best cards (holos, first editions, scarce promos, high-demand starters, or anything with standout rarity) can help you anchor the value of the whole collection