Underground Hollows enters the battlefield tapped unless you pay .
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
, Sacrifice Underground Hollows: Target creature gets +2/+2 until end of turn.
.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead., Sacrifice Underground Hollows: Target creature gets +2/+2 until end of turn.
