On its own it is nothing, but there are a ton of ways for it to prove worthwhile and it got so bad that Wizards was forced to strike it down in some formats rather than ban other cards that served a more balanced purpose
After threatening to kill Valvagoth by destroying the house, which the demon is bound to, Valvagoth instead strikes a deal with Marina where he promises to return the world to normal
Still, beating down often doesn't need rares and mythics
In the "Savage Hunter" deck, rather than Izoni, Thousand-Eyed and Mask of Immolation, you'll find these two new cards perfect for multiplayer games with that Jund sacrifice deck: And in the "Knights' Charge" deck, rather than Shivan Dragon and Tajic, Legion's Edge, you'll find these two multiplayer-attacking powerhouses: As Melissa alluded to earlier, this is one of the ways they could make cards that were powerful for Brawl, without risking that the set would have cards you would badly need for Standard Constructed
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