Sorcerer's Broom

If Sorcerer's Broom leaves the battlefield before its triggered ability resolves, the token will still enter the battlefield as a copy of Sorcerer's Broom, using Sorcerer's Broom's copiable values from when it was last on the battlefield.

The ability of Sorcerer's Broom is a triggered ability, not an activated ability. It doesn't allow you to sacrifice a permanent whenever you want; rather, you need some other way of sacrificing permanents, such as the activated ability of Food tokens.

While resolving the triggered ability of Sorcerer's Broom, you can't pay {3} multiple times to create more than one token. However, if you control more than one Sorcerer's Broom, you can pay {3} for each of their abilities.