Heggen reassures me that they are thoughtful about what new Secret Lair cards are doing to strategies outside of Commander, saying we're not trying to accidentally ruin those formats by casually printing hyper-powerful cards into them. That said, the concept of mechanically unique Secret Lair cards existing at all has been a hot topic in the community regardless of power level
This card isnt a mythic rare that an art director pushed for
Why Choose The Great Wave Design
You basically toss in cards like Leyline of Anticipation and Vivien, Champion of the Wilds to give your creatures flash, add in some more morphs (although many of the best ones are already in the precon), and you're good to go
Stuff like Snuff Out or Dismember are already heavily played cards, but here, you get to draw a card from them because you lost 4 life, and you also get to drain your opponents for 2 life, offsetting your life loss