Hollow Ruins enters the battlefield tapped unless you control two or more creatures.
: Add or to your mana pool.
Put Hollow Ruins on top of your library: Add to your mana pool.
, Sacrifice Hollow Ruins: Target creature gets +2/+2 until end of turn.
: Add 
or 
to your mana pool.
to your mana pool. , Sacrifice Hollow Ruins: Target creature gets +2/+2 until end of turn.
