Star Siphon is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Star Siphon is Unlimited.
YGOPRODeck lists Star Siphon for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Star Siphon appears in Legendary Collection 5D's Mega Pack (LC5D-EN109) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Star Siphon is about $0.07 on Cardmarket (prices change frequently).
