In this rule

Historical Rules · 29 April 2022

Rule 702.82c

Official source text from the 29 April 2022 Rules release

Permalink

Devour [type] is a variant of devour. “Devour [type] N” means “As this object enters the battlefield, you may sacrifice any number of [type] permanents. This permanent enters the battlefield with N +1/+1 counters on it for each permanent sacrificed this way.”

Find this number in the current Rules