Graceful Dice is a Quick-Play 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, Graceful Dice is Unlimited.
YGOPRODeck lists Graceful Dice for these formats: GOAT, Speed Duel, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Graceful Dice appears in Gold Series 4: Pyramids Edition (GLD4-EN037) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Graceful Dice is about $0.21 on Cardmarket (prices change frequently).
