The biggest threats to this deck are board wipes and other removal spells that slow it down, but the deck is cheap and efficient so you should be able to create steady pressure every match
In the Magic story, Gerrard makes the sacrifice play, along with Urza and Karn, contributing to the death of Yawgmoth and the rebirth of Karn as a new planeswalker
The showcase foil-etched version of Farewell is priced at around $17 and the extended foil variant is valued at around $18 to $20
Outside of that Im less excited, but I could imagine it showing up
In fact, there were only a couple of instances where type was relevant from a rules standpoint
The best times to push are when you can build up enough mana to drop several creatures at once, and then cycle immediately to ensure you get some triggers