When Krosan Seafloor enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool. Krosan Seafloor deals 1 damage to you.
, , Sacrifice Krosan Seafloor: Target player draws two cards, then discards two cards.
.
: Add 
or to your mana pool. Krosan Seafloor deals 1 damage to you., , Sacrifice Krosan Seafloor: Target player draws two cards, then discards two cards.
