You may look at the top card of your library any time.
You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost.
{T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.
![Post's Citadel - Bolas's Citadel [Secret Lair Drop Series]](http://www.cosmicgames.com/cdn/shop/files/7572bb1d-0578-4ebb-9180-dbb709ec9a5c.png?v=1759371059&width=1445)
