RavenousRavenous is a keyword found on some creature cards with in their mana cost. Ravenous represents both a replacement effect and a triggered ability. “Ravenous” means “This permanent enters with X +1/+1 counters on it” and “When this permanent enters, if X is 5 or more, draw a card.” See rule 107.3m. (CR 702.156) (This creature enters with X +1/+1
countersTo counter a spell or ability is to cancel it: remove it from the stack without resolving it. A counter on an object or player is instead a marker that changes characteristics or interacts with rules or abilities; for example, a +1/+1 counter modifies a creature’s power and toughness. (CR 701.6; 122.1) on it. If X is 5 or more, draw a card when it enters.)
Whenever this creature attacks,
createTo create one or more tokens with certain characteristics, put the specified number of tokens with the specified characteristics onto the battlefield.
If a replacement effect applies to a token being created, that effect applies before considering any continuous effects that will modify the characteristics of that token. If a replacement effect applies to a token entering the battlefield, that effect applies after considering any continuous effects that will modify the characteristics of that token.
Previously, an effect that created tokens instructed a player to “put [those tokens] onto the battlefield.” Cards that were printed with that text have received errata in the Oracle card reference so they now “create” those tokens. (CR 701.7) a number of 1/1 white Rabbit creature tokens equal to this creature's power.