Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) When Ancestral Knowledge enters the battlefield, look at the top ten cards of your library, then exile any number of them and put the rest back on top of your library in any order. When Ancestral Knowledge leaves the battlefield, shuffle your library.
Near Mint - $5.200
Lightly Played - $4.200
Moderately Played - $3.700
Heavily Played - $3.100
Damaged - $2.600
Near Mint Spanish - $5.200
Lightly Played Spanish - $4.200
Moderately Played Spanish - $3.700
Heavily Played Spanish - $3.100
Damaged Spanish - $2.600