The card is actually one of the weaker discard outlets on the list, you will generally have to wait till turn three to do it, it happens in the combat step, you need another guy to crew the Copter and they can deny the loot with removal
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Blasphemous Act)
But to be honest there is only one Beast Within
something as simple as Ideas Unbound or Brainstorm will see us flipping Tamiyo immediately and activating their first ability to protect them from the inevitable 2/1 monkey your opponents are sending at you turn 1
Now, how high do you think the serialized doctor cards will go?
The player whose turn it is has priority as each step and phase begins, and they receive priority after each spell and ability resolves