The set reintroduces beloved Innistrad mechanics like Flashback, tribal synergies for Zombies and Werewolves, and double-faced cardsmany of which are format staples in Commander and Modern
On yet another axis, youre sacking a lot of creatures anyway so maybe you want something like Whisper, Blood Liturgist
13.2 If a Lot is unsold at the Sale, the Company is authorised by the Seller as the Seller's sole agent to sell the Lot by private treaty or by auction for a price that is not less than the Agreed Reserve at any time within 28 days after the Sale, provided that: (a) if the highest offer for an unsold Lot is referred to the Seller then the Seller may accept that offer
There are a few different types of symbols that can appear here
Waterproof storage case for jumbo Pokemon & Downtown sports cards
If you still have a bit to go to whittle down your opponents life total, slow down a creature with 2 damage and a players life total or planeswalker loyalty points with another 2 damage