Oltec Matterweaver

Oltec Matterweaver’s ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.

If the copied token is copying something else, then the new token enters the battlefield as whatever that token copied.

Any enters-the-battlefield abilities of the copied token will trigger when the token enters the battlefield. Any “as [this permanent] enters the battlefield” or “[this permanent] enters the battlefield with” abilities of the copied token will also work.