Historical Rules · 2 February 2024
Rule 702.156a
Official source text from the 2 February 2024 Rules release
Ravenous is a keyword found on some creature cards with {X} in their mana cost. Ravenous represents both a replacement effect and a triggered ability. “Ravenous” means “This permanent enters the battlefield with X +1/+1 counters on it” and “When this permanent enters the battlefield, if X is 5 or more, draw a card.” See rule 107.3m.