Ancestral Knowledge EDHREC Rank_4638 Whenever Captain's Hook becomes unattached

Whenever Captain's Hook becomes unattached from a permanent

Song of the Dryads

you get the city's blessing for the rest of the game

Soulless One's power and toughness are each equal to the number of Zombies on the battlefield plus the number of Zombie cards in all graveyards

Ancestral Knowledge EDHREC Rank_4638 Whenever Captain's Hook becomes unattachedAncestral Knowledge Enchantment Cumulative upkeep (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.