Level Up! 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, Level Up! is Unlimited.
YGOPRODeck lists Level Up! for these formats: GOAT, OCG GOAT, Duel Links, Speed Duel, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Level Up! appears in Dark Revelation Volume 3 (DR3-EN041) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Level Up! is about $0.45 on Cardmarket (prices change frequently).
