In a Commander game, the Piledrivers power will surely skyrocket to preposterous proportions, allowing you to (hopefully) swing at multiple players at a time for lethal damage so long as your board is chock full of those lovely, grubby little Gobbos
Despite being less flexible than black in this area, blue tutors still bring significant value to the table, so lets take a look at which ones are most likely to consistently improve your Commander decks performance
For example, say you've cast two spells this turn, and with Murmuration's last ability on the stack, you cast a Blizzard Strix (a Bird creature spell with flash that may have been chosen for this example due to being an adorable owl)
Ghoulcaller GisaGhoulcaller Gisa is back, this time without her brother, to lead a black deck of Zombies and sacrifice outlets
The resulting spell's color, mana cost, mana value, and so on are determined by only those alternative characteristics
Hi btw, I'm a sometime lurker but I think I can help here