Mindslaver Toolkit [Unknown Event]Set: Unknown Event Type: Artifact Rarity: Common Cost: {0} T: Target opponent gains control of Mindslaver Toolkit. X, T: Choose any number You lose X life. You discard X cards. You sacrifice X permanents.

We must understand it

−3: Target creature gets -X/-X until end of turn

it gets +2/+2 until end of turn for each creature blocking it beyond the first

If you rolled doubles

Ancient magic reshapes the stage into a variety of landscapes

transcendent

Cultivator Colossus's power and toughness are each equal to the number of lands you control

Set: Shadows over Innistrad Prerelease Promos Type: Creature — Zombie Rarity: Mythic Cost: {B}{B} Menace (This creature can't be blocked except by two or more creatures

Set: Legends Type: Legendary Land Rarity: Uncommon {T}: Add {G}

Set: Commander 2011 Oversized Type: Legendary Creature — Zombie Elemental Rarity: Rare Cost: {B}{G} Haste

Repeat this process until no one puts a card onto the battlefield

Set: EX: Delta Species Type: Fighting Rarity: Common Retreat cost: Colorless