The gray disciple contemplates the inner voice of duergar magic and the silent eternity of stone, mastering these dual mysteries and combining them to deadly effect.
Gray disciples have the following class features:
At 4th level, as a swift action, the gray disciple can become invisible (as the invisibility spell) for 1 round by spending 1 ki point. To use this ability, the gray disciple must already have invisibility as a spell-like ability.
At 6th level, as a swift action, the gray disciple can enlarge himself (as the enlarge person spell) for 1 minute by spending 1 ki point. To use this ability, the gray disciple must already have enlarge person available as a spell-like ability.
This ability replaces wholeness of body.
At 12th level, as a swift action, the gray disciple can spend a ki point to walk through solid stone for 1 round. This functions as the earth glide universal monster ability. The gray disciple may continue earth gliding as long as he spends 1 ki point every round as a swift action. If he ceases earth gliding within a solid object, he is violently ejected and takes 5d6 points of damage. The gray disciple is not harmed by damage caused to material he is earth gliding through, but a stone to flesh spell cast upon it causes violent ejection as described above.
This ability replaces abundant step.
At 15th level, a gray disciple can phase a foe into solid rock, killing it instantly. To use this ability, he expends 1 ki point as part of a bull rush or reposition combat maneuver against a creature adjacent to unworked earth or stone. If the attempt succeeds, the gray disciple pushes his foe inside the rock using his earth glide ability. If the creature succeeds at a Reflex save (DC 10 + 1/2 the gray disciple's monk level + the gray disciple's Wisdom modifier), it is ejected in the nearest open space and takes 5d6 points of damage. If it fails, it dies instantly as its body merges with the surrounding stone. Entomb is usable once per day, but a failed bull rush or reposition attempt does not count as a use of the ability. Entomb has no effect on creatures that can earth glide, are incorporeal, or can otherwise can survive merging with a solid object.
This ability replaces quivering palm.
At 17th level, a gray disciple can attempt to control a creature with the earth subtype once per day. This ability is treated as dominate monster (DC 10 + 1/2 the gray disciple's monk level + the gray disciple's Wisdom modifier), but is only effective against creatures with the earth subtype, and the gray disciple can keep only a single creature enthralled. If he attempts to control a second creature with this ability, the first creature is automatically released from domination whether or not the second attempt succeeds.