At the beginning of your upkeep, Blackcleave Flagstones deals 1 damage to target creature you control.
: Add or to your mana pool.
Sacrifice Blackcleave Flagstones: Add or to your mana pool.
, Sacrifice Blackcleave Flagstones: Add to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool., Sacrifice Blackcleave Flagstones: Add 
to your mana pool.
