Magewright's Stone [Mystery Booster] Human Soldier Assassin put a -1/-1 counter on

put a -1/-1 counter on enchanted creature

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

that player sacrifices all but that many permanents

the seed of life

{T}: Add {C} for each charge counter on Everflowing Chalice

Magewright's Stone [Mystery Booster] Human Soldier Assassin put a -1/-1 counter onSet: Mystery Booster Type: Artifact Rarity: Uncommon Cost: {2} {1}, {T}: Untap target creature that has an activated ability with {T} in its cost. The stones hark back to an age before civilization, when the living earth blessed all who trod its untamed wilds.