1. I believe the card is called Fiendish Rites, but I might be wrong;
2. The card seems pretty damn good in a zoolock deck with Galakrond as a lategame option. Swarming your board with cards like Dragonblight Cultist, Rafaam’s Scheme or Scarab Egg, then buffing them with this while summoning even more minions at the same time. This is definitely better than Impferno, and probably could find some space in an egg/swarm zoolock.
This isn't great, but it is better than many people are assuming. Because Invoke triggers an upgraded hero power, this summons two 1/1 imps prior to the buff, so it is actually a buff+token generator that will, at minimum, result in you getting two 2/1 demons. In a zoo strategy where you have already dropped a minion each turn, this could be pretty good.
Man, warlock better get some killer cards in the next reveals or it's another 3 months in the doghouse. Spent the season trying to get my 500th warlock win and it was brutal. Had to switch to wild to speed up the process.