Great Hall of the Biblioplex is a rare Land card from Magic: The Gathering (Secrets of Strixhaven Promos, PSOS).
Rare
Secrets of Strixhaven Promos (PSOS)
Mana Value
0
Card Text
{T}: Add {C}.
{T}, Pay 1 life: Add one mana of any color. Spend this mana only to cast an instant or sorcery spell.
{5}: If this land isn't a creature, it becomes a 2/4 Wizard creature with "Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn." It's still a land.
