Carnival of Flourishing

Whenever a nonlegendary land enters the battlefield under your control, create a land token that's a copy of it, then put a carnival counter on Carnival of Flourishing.
Remove X carnival counters from Carnival of Flourishing where X is at least five, sacrifice Carnival of Flourishing: Reveal the top X cards
of your library, put any number of creature cards revealed this way onto the battlefield, and exile the rest.