Yeah, Essense, my understanding was each phase of the "combo" was done one at a time, in different turns.
With that said, if adrenaline only completed one combo, it wouldn't be all that powerful. (Two moderately high cost cards for 9+2 poison a turn.) Sure, overtime it will do a lot, but it's easy to kill, and frogs do 12 damage a turn for mono and one of them being way cheaper in the combo.