Quest for the Holy Relic

Whenever you cast a creature spell, you may put a quest counter on this enchantment. Remove five quest counters from this enchantment and sacrifice it: Search your library for an Equipment card, put it onto the battlefield, attach it to a creature you control, then shuffle.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms661xzh034qpq01kijl9agz.