Tainted PeakHow it works & interactions with other cards

Dual Mana with a Condition

Tainted Peak has two distinct mana abilities. The first ability is always available, allowing you to tap the land for one colorless mana. The second ability allows you to produce either Black or Red mana, but it carries a specific requirement: you must control at least one permanent with the 'Swamp' land type. This includes basic Swamps or non-basic lands that have the Swamp subtype.

Step-by-Step Resolution

First, you check if you need mana to pay for a spell or ability. Second, you verify if you control a Swamp; if you do not, you may only activate the ability that produces colorless mana. Third, if a Swamp is present, you choose between Black or Red mana, tap Tainted Peak, and add that mana to your mana pool. This is a mana ability that does not use the stack and cannot be responded to.

Common Pitfalls

A common mistake is assuming Tainted Peak itself is a Swamp; it is not, as it lacks the 'Swamp' subtype in its type line. Consequently, one Tainted Peak cannot enable another Tainted Peak to produce colored mana. Additionally, if your only Swamp is destroyed in response to a spell you are trying to cast, you must ensure you have already tapped Tainted Peak for mana before the Swamp leaves the battlefield.

Strategic Implementation

Tainted Peak is best utilized in decks with a high density of Swamps or fetchable dual lands that possess the Swamp type. It enters the battlefield untapped, making it faster than many other budget dual lands, provided your deck can consistently meet the Swamp requirement by turn two or three.

Interaction examples

Colorless Start

If Tainted Peak is your only land on the battlefield during turn one, it can only tap for colorless mana. Because you do not control a Swamp, the second ability cannot be activated.

Fixing with Command Tower

Command Tower

If your Commander is Rakdos (Black and Red), Command Tower can produce either color immediately. However, even with Command Tower out, Tainted Peak still only produces colorless mana because Command Tower does not have the Swamp land type.

Opponent Interaction

Exotic Orchard

If you control a Swamp and Tainted Peak, your Exotic Orchard can now produce Black or Red mana if an opponent also controls a land that could produce those colors. Tainted Peak provides the colored mana you need, but only after your basic Swamp satisfies the condition.