Relentless Dead [Shadows over Innistrad] Urza's Mine you may remove any number

you may remove any number of +1/+1 counters from Tetravus

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

Set: The Dark Type: Creature — Human Cleric Rarity: Rare Cost: {W}{W} {1}{W}

it produces colorless mana instead of white mana

Relentless Dead [Shadows over Innistrad] Urza's Mine you may remove any numberSet: Shadows over Innistrad Type: Creature Zombie Rarity: Mythic Cost: {B}{B} Menace (This creature can't be blocked except by two or more creatures.) When Relentless Dead dies, you may pay {B}. If you do, return it to its owner's hand. When Relentless Dead dies, you may pay {X}. If you do, return another target Zombie creature card with mana value X from your graveyard to the battlefield.