Tiller Engine (Extended Art) [Dominaria United Commander] Starter 1999 Roar of the World is

Roar of the World is in the command zone or on the battlefield

This attack does 20 damage times the number of heads

Set: Base Set (Shadowless) Type: Lightning Rarity: Holo Rare Retreat cost: 1 [1LL] Thunder Wave (30)

At the beginning of the upkeep of enchanted creature's controller

Battle doesn't need a purpose

Tiller Engine (Extended Art) [Dominaria United Commander] Starter 1999 Roar of the World isSet: Dominaria United Commander Type: Artifact Creature Construct Rarity: Rare Cost: {2} Whenever a land enters the battlefield tapped and under your control, choose one Untap that land. Tap target nonland permanent an opponent controls.