Ancestral Knowledge EDHREC Rank_4638 As Sower of Discord enters

As Sower of Discord enters the battlefield

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

They can't be regenerated

Ninja of the Deep Hours

Khorvath's Fury

Ancestral Knowledge EDHREC Rank_4638 As Sower of Discord entersAncestral 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.