Cumulative upkeep—Pay {B} and 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
If a land is tapped for mana, it produces {B} instead of any other type.
Mana cost
2
B
B
Mana value
4
Printings
From
$6.69
EDHREC rank
#18601
Buy
Formats
Legacy
Legal
Vintage
Legal
Commander
Legal
Rulings
1 Oct 2008
This effect changes the type of mana produced, but not the amount. For example, if a land that's tapped for mana would add {W}{W}, it adds {B}{B} instead.