These are the free sacrifice outlets in this deck: Altar of Dementia Carrion Feeder Cartel Aristocrat Spawning Pit Viscera Seer Priest of Forgotten Gods (must tap Priest of Forgotten Gods but should probably be done at sorcery speed unless you have an instant to use with the 2 extra black mana the ability will give you) While these are probably your best targets to sacrifice a creature, there are a couple more
It seems it's not just an individual instance however, the affected creatures are like this for everyone
DallasCardShow.com July 25-26 TX, Conroe
If youre playing a deck full of reanimation spells, discarding a big creature so you can bring it back cheap is a strong play
Can I pull a SAR from a regular Japanese booster box
I get that its a 4-drop or whatever, but when you flip it and cast a cantrip and a 2-mana spell, well, thats a good time