I remember there being a homebrew remake of the Henshin back on the AEG boards. Would anyone still happen to have a copy of it?

Here you go. Sadly, I don't know/remember the poster to give proper credit.

Asako Henshin (Monk)

Benefit: +1 Willpower

Skills: Calligraphy, Jujitsu, Lore: Elements (pick an Emphasis), Lore: Theology, Mediation, Medicine, Any one Skill (must not be a Low Skill).

Honor: 5.5

Outfit: Robes, Bo, Scroll Satchel, Traveling Pack, 5 koku.

Rank 1 Technique: The Four Mysteries

You may, as a Simple Action, select one of your rings (except Void). You gain a bonus number of kept dice equal to half your School Rank, rounded up, to all Ring, Trait, and Skill rolls tied to that ring. A Henshin may never invoke more than one Mystery on himself simultaneously. This bonus lasts for a number of minutes equal to your Insight Rank and may be done a total number of times per day equal to 5 times your Insight Rank.

Rank 2 Technique: Reveal the Path

You may, as a Simple Action, expend the use of one of your Mysteries to grant its effects to another target. You may instead choose to impose an equivalent penalty (not a reduction) when activating this technique. Granting a Mystery to an unknowing or unwilling target requires a Contested Willpower Roll. A single individual may only benefit from one Mystery at a time.

Rank 3 Technique: The Four Riddles

You may, as a Simple Action, invoke the kami's blessings in the form of one Riddle. A Henshin character may never invoke more than one Riddle on himself simultaneously, and any given Riddle may only be employed a maximum number of times per day equal to the character’s relevant Ring.

Air: You may invoke Air's blessing and now cannot be deceived by any illusion or other false images, and can perceive them as transparent falsehoods. This blessing has no effect on spells that have a Mastery Level equal or higher then your Insight Rank. This effect lasts a number of Hours equal to your Insight Rank.

Earth: You may invoke Earth's blessing and gain immunity to all Conditional Effects that effect the body (excluding Grappled and Mounted). This effect lasts a number of Hours equal to your Insight Rank.

Firs: You may invoke Fire's blessings to increase the number of kept dice on an unarmed damage roll (which is nominally 0k1) equal to your Fire Ring. This effect lasts a number of Rounds equal to your Insight Rank.

Water: You may invoke Water's blessing and now take one Complex Action and one Simple Action per Turn, or you may instead take 3 Simple Actions per Turn. This effect lasts a number of Rounds equal to your Insight Rank.

Rank 4 Technique: Illuminate the Path

You may, as a Simple Action, expend the use of one of your Riddles to grant that Riddle to another, for its normal duration. Granting a Riddle to an unknowing or unwilling target requires a Contested Willpower Roll. A single individual may only benefit from one Riddle at a time, however you may have a Riddle active on yourself and as many other people as you wish.

Rank 5 Technique: The Mystery and Riddle of Fate

You require no sleep and do not age normally. You are effectively immune to natural death, though you may be slain like any mortal. You may select your Void Ring as the target of your Rank 1 technique, and may use your Rank 3 technique to use the following, which you may use a number of times per day equal to your Void Ring.
Fate: When you spend a Void Point to add a bonus of +1k1 to any Skill or Trait Roll, you may also add your Lore: Elements Rank to the total of that roll. This effect lasts a number of Hours equal to your School Rank.

Asako Henshin (Monk)

Benefit: +1 Willpower

Skills: Calligraphy, Jujitsu, Lore: Elements (pick an Emphasis), Lore: Theology, Mediation, Medicine, Any one Skill (must not be a Low Skill).

Honor: 5.5

Outfit: Robes, Bo, Scroll Satchel, Traveling Pack, 5 koku.

Rank 1 Technique: The Four Mysteries

You may, as a Simple Action, select one of your rings (except Void). You gain a bonus number of kept dice equal to half your School Rank, rounded up, to all Ring, Trait, and Skill rolls tied to that ring. A Henshin may never invoke more than one Mystery on himself simultaneously. This bonus lasts for a number of minutes equal to your Insight Rank and may be done a total number of times per day equal to 5 times your Insight Rank.

Rank 2 Technique: Reveal the Path

You may, as a Simple Action, expend the use of one of your Mysteries to grant its effects to another target. You may instead choose to impose an equivalent penalty (not a reduction) when activating this technique. Granting a Mystery to an unknowing or unwilling target requires a Contested Willpower Roll. A single individual may only benefit from one Mystery at a time.

Rank 3 Technique: The Four Riddles

You may, as a Simple Action, invoke the kami's blessings in the form of one Riddle. A Henshin character may never invoke more than one Riddle on himself simultaneously, and any given Riddle may only be employed a maximum number of times per day equal to the character’s relevant Ring.

Air: You may invoke Air's blessing and now cannot be deceived by any illusion or other false images, and can perceive them as transparent falsehoods. This blessing has no effect on spells that have a Mastery Level equal or higher then your Insight Rank. This effect lasts a number of Hours equal to your Insight Rank.

Earth: You may invoke Earth's blessing and gain immunity to all Conditional Effects that effect the body (excluding Grappled and Mounted). This effect lasts a number of Hours equal to your Insight Rank.

Firs: You may invoke Fire's blessings to increase the number of kept dice on an unarmed damage roll (which is nominally 0k1) equal to your Fire Ring. This effect lasts a number of Rounds equal to your Insight Rank.

Water: You may invoke Water's blessing and now take one Complex Action and one Simple Action per Turn, or you may instead take 3 Simple Actions per Turn. This effect lasts a number of Rounds equal to your Insight Rank.

Rank 4 Technique: Illuminate the Path

You may, as a Simple Action, expend the use of one of your Riddles to grant that Riddle to another, for its normal duration. Granting a Riddle to an unknowing or unwilling target requires a Contested Willpower Roll. A single individual may only benefit from one Riddle at a time, however you may have a Riddle active on yourself and as many other people as you wish.

Rank 5 Technique: The Mystery and Riddle of Fate

You require no sleep and do not age normally. You are effectively immune to natural death, though you may be slain like any mortal. You may select your Void Ring as the target of your Rank 1 technique, and may use your Rank 3 technique to use the following, which you may use a number of times per day equal to your Void Ring.
Fate: When you spend a Void Point to add a bonus of +1k1 to any Skill or Trait Roll, you may also add your Lore: Elements Rank to the total of that roll. This effect lasts a number of Hours equal to your School Rank.