While not for every deck, these cards definitely dont see quite as much play as they really should, and should be considered for any deck containing several cards that benefit from interacting with your graveyard
For example, discarding easily recurred creatures, such as Gutterbones, easily pays the cost
Concealing Curtains shares another lineage: early defenders that transform into threats
I realized it was too late to really do anything about it
That's about the average we'd see for most Commander decks, and might even be excessive for a deck that relies on aggression
If you ask any general Pokmon fan for their favorite Pokmon, the odds are strong that they will reply with a name that has captivated fans for the better part of three decades: Charizard