Were going to be playing loose with the history and available technology of Magic to allow creatures and spells that would have required a lot of extra rules text to properly function in early Magic
Esper Charm Esper Charms versatility is surprisingly good, and while it's often used as an instant version of Divination, this charm can be handy when needed to remove enchantments or just deprive your opponents last few cards from their hand
You add just two counters on your blue planeswalker, because Doubling Season specifically says you only get double counters from an effect , and adding loyalty counters to activate a loyalty ability is a cost , not an effect
However, if you want to use this creature as your Orzhov commander or as part of your infect deck, it's an option
A great set combines cards you want to buy for the thrill of it, cards that shape how the game is played, themes and mechanics that bring pure fun, and stories that stay with you long after the match