Free sacrifice outlets are good, and one that turns your gobos into mana is good too
Except this particular anything #7: Lathnu Hellion A three-mana 4/4 that can attack twice before getting sacrificed is an incredible amount of damage to have pushed through by turn 4, and in multiples the Hellion has closed out games
On top of that, the ability to scale its damage with additional mana makes it a flexible tool in the mid-to-late game
This deck is already considered the most busted deck in standard, so it looks like $20 is the going rate
Now, in a post-holiday-release world, that value has dropped to $13.54 (11.02) as of November 14
Once you think about putting Draining Whelk with it, folks are going to get justifiably anxious and you should deal with them nuking your Navigato with good humor