(If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.) Abilities you activate that aren't mana abilities cost less to activate
Otherwise, be prepared to face Thoughtseize every time you play against a black deck, be it against midrange decks like Jund, Deaths Shadow, Rakdos, Dredge, or combo decks like Yawgmoth or Esper Reanimate
But the heavy reprint of cards from Sets 1-4 into Set 9 will still keep staples of some game mechanics and certain aspects of ink color identity
### Resilient to Combat Vault of the Archangel makes blocking miserable for opponents
On the other hand, if you have access to either of these cards, you might as well throw them into the deck
My verdict: Professors Research is a must-run in almost every deck simple, strong, and timeless