Bladegriff Prototype isn't bad, but its effect doesn't always help you as much as it helps others, and once a multiplayer game is down to two players, it's basically just your opponent sacrificing permanents, which might not be that impactful in the late game
There's also some good Golgari ways to get creatures into your yard and so this is an okay enabler/payoff
It also plays well with the generic counters matter Bant archetypes that was just released and is Standard-legal, where you can grab all sorts of counters for this
Reflections of Littjara Reflections of Littjara wants you to cast creatures of a given type, and thats what you already want in typal decks
A few cards have already stood out, benefiting from their legality, be it as commanders, combo pieces, or just a weird on-off trick
In an EDH game where three players are trying to attack you, you want to make life harder if they choose you