Lake of the Dead

Land -
If Lake of the Dead would enter the battlefield, sacrifice a Swamp instead. If you do, put Lake of the Dead onto the battlefield. If you don't, put it into its owner's graveyard. <CR>
{T}: Add {B} to your mana pool. <CR>
{T}, Sacrifice a Swamp: Add {B}{B}{B}{B} to your mana pool.

Land -
If Lake of the Dead would enter the battlefield, sacrifice a Swamp instead. If you do, put Lake of the Dead onto the battlefield. If you don't, put it into its owner's graveyard. <CR>
{T}: Add {B}. <CR>
{T}, Sacrifice a Swamp: Add {B}{B}{B}{B}.

Land -
If Lake of the Dead would come into play, sacrifice a Swamp instead. If you do, put Lake of the Dead into play. If you don't, put it into its owner's graveyard. <CR>
{T}: Add {B} to your mana pool. <CR>
{T}, Sacrifice a Swamp: Add {B}{B}{B}{B} to your mana pool.

Land -
If Lake of the Dead would enter the battlefield, sacrifice a Swamp instead. If you do, put Lake of the Dead onto the battlefield. If you don't, put it into its owner's graveyard. <CR>
{T}: Add {B} to your mana pool. <CR>
{T}, Sacrifice a Swamp: Add {B}{B}{B}{B} to your mana pool.