Ojamandala 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, Ojamandala is Unlimited.
YGOPRODeck lists Ojamandala for these formats: Duel Links.
Ojamandala belongs to the Ojama archetype—use that tag when searching for engine pieces and tech options.
Among markets shown on this page, the lowest listed snapshot for Ojamandala is about $1.56 on Amazon (prices change frequently).
