When Molten Verge enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
Put Molten Verge on top of your library: Add to your mana pool.
, Sacrifice Molten Verge: Molten Verge deals 1 damage to target creature or player.
.
: Add or 
to your mana pool.
to your mana pool. , Sacrifice Molten Verge: Molten Verge deals 1 damage to target creature or player.
