You could stick Reality Smasher in this slot as well, but the truth is that there are enough unique Eldrazi decks to make Thought-Knot Seer a true format staple
Yidris VS Abaddon Yidris has four colors in its color identity while Abaddon only has three, and which is better can vary depending on your deckbuilding needs
These Gods are not indestructible, or recursive which, if you know anything about Norse mythology, is right on the money but instead feature a flipside
Prowl Freerunning and prowl share some similarities as both mechanics care about creatures of a certain type dealing combat damage to enable their alternative cost
Kausts greatest trick are the disguise/morph creatures it can flip for free, monsters like Akroma, Angel of Fury and Pyrotechnic Performer
I don't think it particularly matters who your commander is in Bant, you're going to have better cards in the deck to pair with specifically Selesnya Eulogist and more generally with Populate