Pride of the Weak is a Continuous 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, Pride of the Weak is Unlimited.
YGOPRODeck lists Pride of the Weak for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Pride of the Weak appears in Starter Deck: Yu-Gi-Oh! 5D's 2009 (5DS2-EN021) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Pride of the Weak is about $0.17 on Cardmarket (prices change frequently).
