5 cards where (the flavor text contains “knowledge” and the flavor text contains “pool”)

Grid Monitor (Mirrodin #183)
Override (Mirrodin #45)
Seat of the Synod (Commander 2018 #278)
Turn Aside (Scars of Mirrodin #49)
Vedalken Archmage (Jumpstart #187)

In the blink of an eye, they strode from deep snow to the end of this search.