If either you or the chosen opponent controls no creatures, the other player still chooses a creature they control
With these solutions, you still have plenty of product to sell, and plenty of opportunities to bring in new players, without overwhelming the established fan base
Notably, there are two variants for this particular deck: the battlecruiser version that isnt really running win conditions outside of draw engines, and the self-mill version that wants to win with Thassas Oracle using various milling effects from Adventure spells
You have a healthy amount of basics, so theres minimal concern of running into Ruination or Blood Moon
Sadly, because it is five mana and slow to get going, although it is still a great threat, it is not a great life gain card