Thunder of Ruler 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, Thunder of Ruler is Unlimited.
YGOPRODeck lists Thunder of Ruler for these formats: GOAT, OCG GOAT, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Thunder of Ruler appears in Astral Pack One (AP01-EN023) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Thunder of Ruler is about $0.02 on Cardmarket (prices change frequently).
