Obsidian Fireheart
{1}{R}{R}{R}
Creature -- Elemental
4/4
{1}{R}{R}: Put a blaze counter on target land without a blaze counter on it. For as long as that land has a blaze counter on it, it has "At the beginning of your upkeep, ~this~ deals 1 damage to you." (The land continues to burn after ~this~ has left the battlefield.)