By the time Mufasa is out, those cards are probably much more relevant
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 (Unhinged)
That's all we've to share with you for now
This Creature is incredibly unaggressive as a 0/5 but can serve as a good early-game blocker
Legendary Creature - Spirit Color tag templates(None) Karmic Guide Flying, protection from black Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, return target creature card from your graveyard to the battlefield
Later on, you could be making Wurmcoil Engines or Combustible Gearhulks, and if you happen to have a token doubler like Anointed Procession on hand, it will not be difficult to run away with games