Just downright bad if comparable to SoB, Precognition, and pretty much any other draw-boosting card.
I agree for the unupgraded. Not for the upgraded.
The upgraded gives an effective 1 card advantage for the price of 20 life over 2 turns.
For decks that can compensate via empathic bond / jade staff etc. It could be worth the price.
In a pinch, +4 cards can be a major game saver.
Also, since the player has to actually draw those adrenaline crashes to feel the effect, it makes a nice soft counter to eternity locks.
The unupgraded feels a little weak...
I would suggest, make them both draw 4 and put 2 crashes on deck, then just go with a standard cost reduction for the upped version.