If I were to upgrade these decks with pulls from booster packs, then I would shave some of these weaker cards, especially ones that cannot be turned into ink, and add more five-drops, six-drops and seven-drops
These abilities can offer players advantages during turns, not just adding stats to cards
As an uninkable card with a cost of nine, there's an inherent risk in keeping this in-hand, but any deck that's designed to take a beating can quickly increase its viability
The D23 promo version of Maleficent, Monstrous Dragon, and every other promo from the event are likely to maintain their value over time, making them solid investments if you happen to have a few in your collection.
In Wind/Earth, early Exdeath is quite consistent
Its extreme value stems from a perfect storm of competitive necessity and emotional nostalgia