Free sacrifice effects like this always play pretty well since you can virtually always use the effect, though in this case, you can only do it once
For two mana you give up a permanent you control in exchange for a card
Im not sure why they decided to make a new version of this card, in addition to Transguild Promenade and Rupture Spire
If your Commander deck has two commanders, you can include only cards whose own color identities are also found in your commanders' combined color identities
When many decks are drawing completely dead against a three-drop, that's a strong incentive to find a way to play it or at least sideboard it, even if your deck suffers quite a bit while the card is in play
These new Whisper cards and Boost mechanic will be interesting to see in play, although those cards aren't the ones that are the most valuable from the set