Luckily it says up to one, so you dont have to make it fight, but it can if you need it to
And when that personality is as big as Stan Lees, theres an added challenge
For example, the combination of Etherium Sculptor, The Reality Chip, and Sensei's Divining Top allows you to draw your entire library and win with Thassa's Oracle, and all of those pieces can be found with the artifact tutors listed above
Secondly, Wizards never actually announced the stained-glass planeswalkers (or any bonus cards) to be a part of Secret Lair
While controlling an opponent, you make all choices and decisions for that player
Snow is a middling theme on EDHREC.com it has an okay 7,161 decks registered, which is more than the previous scoring Rats, but only around 37th overall, so hitting a nice new option that offers card advantage, in the popular Bant colors, will hopefully help out loads