(: Add or to your mana pool.)
Vault Den enters the battlefield tapped unless you pay 3 life.
, , Sacrifice Vault Den: Target player discards a card.
, : Target land becomes a 3/3 white Knight creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
, , Sacrifice Vault Den: Target player discards a card.
, : Target land becomes a 3/3 white Knight creature until end of turn. It's still a land.
