cards with persist mtg just revealed more than 40 new Lorwyn Eclipsed (including a powerful Planeswalker) 1 counter on it Obligatory new +1/+1 counter mechanic

There are various methods out there for calculating the "true" worth of cards

While its definitely not a card for faster decks, Purple Pentapus has enough utility in Combo lists to earn a spot among the best new MTG Avatar commons for Pauper

Sealed prices are especially volatile around reprint waves, making alerts particularly useful

That kind of flexibility makes the card

Greed predated Necropotence as the first black enchantment that turned life points into a resource that could be traded for cards, but good old Necro was much more efficient

Outside of those, there's lots of flexibility in cards you can swap with this list and get comparable results so get creative to complete your objectives