Most counterspells are blue cards, and specifically blue instants, as its what blue does best, but there are more than a few playable off-color counterspells
One of the most common ways to do so is to reanimate Atraxa
11 Ajani, Valiant Protector Another Planeswalker deck card, Ajani, Valiant Protector does have a feature in its favor, having two abilities capable of raising its loyalty rather than only one, making its Ultimate slightly easier to access and requiring more effort for opponents to remove
Ingenious Infiltrator A ninja from Modern Horizons , Ingenious Infiltrator allows you to draw a card every time a ninja you control deals combat damage to a player
Tutors are great in Commander since its a 99-card, singleton format, which means Forerunner of the Empire and Priest of the Awakening Sun are super powerful