mtg sigarda commander deck EDH Tech - Sigarda, Font of Blessings - Holier Than Thou! MTG GW Selesnya Sigarda Commander

Agent of Trachery rewards you if you take a lot of cards from other players

Valley Rotcaller Valley Rotcaller ends games, even in Commander, as long as it can attack while you have the correct creature types

Gavin Verhey specifically stated multiple times in this announcement that a lot of the terms of these tiers fall under feel. It is technically very possible to build an incredibly powerful Commander deck that falls under the deck construction rules of the Exhibition Tier, but these decks are specifically weaker than the average Commander precon according to the second tier

Your opponent has an ability to respond to your regeneration trigger

You may not want to cause havoc like this