Kormus Bell

All Swamps are 1/1 black creatures that are still lands.

Black Lotus

, Sacrifice Black Lotus: Add three mana of any one color.

Manabarbs

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

Gauntlet of Might

Red creatures get +1/+1.
Whenever a Mountain is tapped for mana, its controller adds an additional .

Nether Shadow

Haste
At the beginning of your upkeep, if Nether Shadow is in your graveyard with three or more creature cards above it, you may put Nether Shadow onto the battlefield.

Rod of Ruin

, : Rod of Ruin deals 1 damage to any target.

Mana Flare

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.