{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 land deals 1 damage to you." (The land continues to burn after Obsidian Fireheart has left the battlefield.)
Near Mint - $1.20
Lightly Played - $1.00
Moderately Played - $0.90
Heavily Played - $0.70
Damaged - $0.60
Near Mint Spanish - $1.20
Lightly Played Spanish - $1.00
Moderately Played Spanish - $0.90
Heavily Played Spanish - $0.70
Damaged Spanish - $0.60