Ultima, Origin of OblivionHow it works & interactions with other cards

Corrupting the Soil

Ultima's primary ability triggers whenever it attacks, allowing you to place a blight counter on any target land. As long as that land retains the blight counter, it loses all existing land types—such as Forest, Mountain, or Urza's—and all printed abilities. In their place, the land gains a single ability: '{T}: Add {C}.' It is important to note that the land retains its other card types (like Artifact) and supertypes (like Legendary or Basic).

The Power of Colorless Mana

Ultima features a powerful mana-doubling effect. Whenever you tap any land for {C} (colorless mana), Ultima's last ability triggers to add an additional {C} to your mana pool. This is a triggered mana ability, meaning it does not use the stack and cannot be responded to by opponents. This applies to lands blighted by Ultima and any other lands that naturally produce colorless mana.

Strategic Timing

You should deploy Ultima when you want to disrupt an opponent's color fixing or utility lands, such as powerful non-basic lands. Because the blight effect is tied to the counter itself, the land remains changed even if Ultima leaves the battlefield. Use your attack phase to systematically dismantle your opponent's mana base while simultaneously fueling your own high-cost spells.

Interaction examples

Double Blight with Roaming Throne

Roaming Throne

If you have Roaming Throne on the battlefield with 'God' chosen as the creature type, Ultima's attack ability triggers twice. You can target two different lands to receive blight counters. Furthermore, if you tap a land for {C}, Ultima's mana-doubling ability will trigger twice because of Roaming Throne, resulting in a total of {C}{C}{C} from a single land tap.

Blighting a Basic Land

Solemn Simulacrum

After using Solemn Simulacrum to put a Basic Plains onto the battlefield, you may attack with Ultima and target that Plains with a blight counter. The land remains 'Basic' and a 'Land', but it is no longer a 'Plains'. It loses the ability to produce white mana and instead produces {C}. Because of Ultima's static ability, tapping that land now yields {C}{C} instead of its original single white mana.