Shade
Monster Junkie
Here's the prototypical engulf:
Engulf (Ex): Although it moves slowly, a gelatinous cube can simply mow down Large or smaller creatures as a standard action. It cannot make a slam attack during a round in which it engulfs. The gelatinous cube merely has to move over the opponents, affecting as many as it can cover. Opponents can make opportunity attacks against the cube, but if they do so they are not entitled to a saving throw. Those who do not attempt attacks of opportunity must succeed on a DC 13 Reflex save or be engulfed; on a success, they are pushed back or aside (opponent’s choice) as the cube moves forward. Engulfed creatures are subject to the cube’s paralysis and acid, and are considered to be grappled and trapped within its body. The save DC is Strength-based and includes a +1 racial bonus.
The original text seems to imply more of a "follow through on a hit" mechanic. Something like...
Envelop (Ex): A blazozoid that hits a creature smaller than itself with its firetouch attack can attempt to envelop the target as a swift action. The opponent must succeed on a DC x Reflex save or be enveloped. Enveloped creatures are are considered to be grappled and trapped within its body. Each round it remains enveloped, a creature is automatically hit by the blazozoid's firetouch. The blazozoid may not make touch attacks agains other creatures while enveloping a victim. The save DC is Dexterity-based.
Engulf (Ex): Although it moves slowly, a gelatinous cube can simply mow down Large or smaller creatures as a standard action. It cannot make a slam attack during a round in which it engulfs. The gelatinous cube merely has to move over the opponents, affecting as many as it can cover. Opponents can make opportunity attacks against the cube, but if they do so they are not entitled to a saving throw. Those who do not attempt attacks of opportunity must succeed on a DC 13 Reflex save or be engulfed; on a success, they are pushed back or aside (opponent’s choice) as the cube moves forward. Engulfed creatures are subject to the cube’s paralysis and acid, and are considered to be grappled and trapped within its body. The save DC is Strength-based and includes a +1 racial bonus.
The original text seems to imply more of a "follow through on a hit" mechanic. Something like...
Envelop (Ex): A blazozoid that hits a creature smaller than itself with its firetouch attack can attempt to envelop the target as a swift action. The opponent must succeed on a DC x Reflex save or be enveloped. Enveloped creatures are are considered to be grappled and trapped within its body. Each round it remains enveloped, a creature is automatically hit by the blazozoid's firetouch. The blazozoid may not make touch attacks agains other creatures while enveloping a victim. The save DC is Dexterity-based.
