This might honestly be preferable to a Draft for newer players since the decks are put together
Foil reprints happen in special sets (Conspiracy, Battlebond) or curated small sets (From the Vault, Signature Spellbook) and the occasional judge promo/RPTQ release
Im most inclined to suggest a Voltron playstyle for Kefka, since both halves benefit from combat buffs, but honestly, you can build any deck around him
It will give some value, more than a card without a discard effect, but counting the Rat as an equal value outlet to an actually good one is misleading and will result in weaker decks
This deck has consistency, redundancy, and raw power to put it at or near the top of any hard-nosed drafters tier list
Outside of a hard removal spell, theres not much your opponents will be able to do to stop this Dinosaur from sweeping the board