Underground Shelter enters the battlefield tapped unless you pay .
, : Add , or to your mana pool. Underground Shelter deals 1 damage to you.
, , Sacrifice Underground Shelter: Target player draws two cards, then discards two cards.
.
, 
: Add 
, or to your mana pool. Underground Shelter deals 1 damage to you., , Sacrifice Underground Shelter: Target player draws two cards, then discards two cards.
