Five damage is enough to kill almost anything, instant speed is important, and delve isnt hard to enable (especially when youve got cards like Winding Way)
This card is a value machine, giving you some sort of advantage time and time again
This said, both cards are currently banned in Legacy, and they are both brokenly powerful on their face, so my guess would be that they were simply too good for Standard, rather than being part of a specific oppressive combo
Any Werewolf-heavy deck must reckon with the tension of needing to grow its army without double-spelling on their turn
While I did sell this game recently, it was only due to limited time and brain capacity
Sab-Sunen, Luxa Embodied, for instance, is on the complete opposite end of the flavor spectrum