I have 2 Sideboard slots that I want to dedicate toward burn and aggressive strategies. I'm playing a primarily black deck and already have a good bit of removal. I was considering playing 2x of one of these two cards in the Sideboard. Every mode of collective Brutality is relevant against Burn whether it's killing a Goblin Guide, taking a Burn spell, or just gaining a little life. I feel like Gifted Aetherborn could work similarly against Burn. At worst it "gains" 3 life if they spend a card to kill it, or at best it starts activating the drain 2 mode of Brutality every turn by attacking for 2 lifelink. It has enough toughness to eat any of their creatures except a really pumped swiftspear and still gain 2 in the process. What do you guys think?