Grimoire of the Dead [Commander 2019] Elemental Knight Counters aren't removed from your

Counters aren't removed from your permanents due to game rules

) Walking Archive enters the battlefield with a +1/+1 counter on it

then each opponent loses life equal to the sacrificed creature's power

Set: Collectors’ Edition Type: Artifact Rare Cost: {4} All Swamps are 1/1 black creatures that are still lands

Grimoire of the Dead [Commander 2019] Elemental Knight Counters aren't removed from yourSet: Commander 2019 Type: Legendary Artifact Mythic Cost: {4} {1}, {T}, Discard a card: Put a study counter on Grimoire of the Dead. {T}, Remove three study counters from Grimoire of the Dead and sacrifice it: Put all creature cards from all graveyards onto the battlefield under your control. They're black Zombies in addition to their other colors and types.