When companions were initially introduced in Ikoria: Lair of Behemoths, players could cast them directly from the companion zone, but a subsequent update added a three-mana tax to add it to your hand first, making it less desirable to fulfill the stipulation
You're in a spellslinger and rummage color, so ensuring instants and sorceries are in your graveyard should be no problem
They also let you flip a coin at the beginning of your combat step until you lose a flip
The set is also home to some of the most famous kindred cards in Magic including Merfolk, Vampires, Humans, and the relatively new Dinosaurs
After the third straight night of ruined performances, Judith went out and got the most ferocious, flesh-hungry hellhound she could find to discourage any further would-be saboteurs
Predominantly, Invasion of New Phyrexia sees play within the most popular and tribal-loving format: Commander