The creatures 7/5 power and toughness, along with Trample and Haste make it look scary, but youll want to get that damage in with equipped creatures
The deck may be a bit of a glass cannon, even if it aims to play for the long game, but I think its fair to say that Gavi can be built in any number of ways, including dedicating an even higher ratio of the deck to cycling
Once Avacyn hits the board, it's really hard to stop what youre doing, outside of exile removal
The rest of the deck is largely built around enabling your Clue generation to do some silly things , like making Kappa Cannoneer unblockable, or turning your Clues into a rhinoceros wait staff with Killer Service
The real power of cards like Grief comes when you combine it with blink effects like Ephemerate, which allow you to get two ETB triggers and keep the creature in play
Commander Cards Are Coming to Arena