The Eye of Timaeus is a Normal 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, The Eye of Timaeus is Unlimited.
YGOPRODeck lists The Eye of Timaeus for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
The Eye of Timaeus belongs to the Dark Magician archetype—use that tag when searching for engine pieces and tech options.
A listed print of The Eye of Timaeus appears in Dragons of Legend (DRLG-EN005) at Secret Rare rarity.
Among markets shown on this page, the lowest listed snapshot for The Eye of Timaeus is about $0.78 on Cardmarket (prices change frequently).
