Pyramid of Wonders is a Continuous Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Pyramid of Wonders is Unlimited.
YGOPRODeck lists Pyramid of Wonders for these formats: Speed Duel, Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Pyramid of Wonders appears in Battle Pack 3: Monster League (BP03-EN168) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Pyramid of Wonders is about $0.09 on TCGPlayer (prices change frequently).
