Like most Magic: The Gathering cards, the value of Dream Devourer depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Kaldheim)
Blood tokens rummage (discard then draw) , filtering cards
Cards such as [c]Ajanis Pridemate[/c] and [c]Heliod, Sun-Crowned[/c] are ripe with possibilities when it comes to lifegain decks
While value plays a role in determining if a card is worth spending money on to grade, this isn't a concern if you're purely collecting the card for yourself
Force your opponent to deal with Shiko, while ensuring you will be following up with more gas
It arrives untapped and ready to be used