Hypernova Burst 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, Hypernova Burst is Unlimited.
YGOPRODeck lists Hypernova Burst for these formats: TCG, OCG, Master Duel.
A listed print of Hypernova Burst appears in Rising Rampage (RIRA-EN063) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Hypernova Burst is about $0.08 on Cardmarket (prices change frequently).
