You can sneak Kaheera into some creatureless control decks a bit like you can cheat on Zirda
Is it a candidate for adoption in his Deck, which mainly consists of non-Effect Monsters, or his Deck, which is largely focused on Set Cards
The Emerald cards give you plenty of indirect ways to mess up your opponent's plans, meaning that this is a slow-burn deck where every play counts if you want to win
KeyForge has official sealed formats and tournaments based on the uniqueness of decks
Those are all good, and if you can somehow afford dual lands and put them in your Commander deck, then more power to you, but theyre not very exciting really
They want to understand things like card advantage and card utility because it is this intimate knowledge that's going to reward them later on