This is just a quick and general guide to what the new Emma can do for anyone who is either unfamiliar with Emma or is confused by any changes they see.

This guide is still under going construction as live testing is currently in progress and some things may not be 100% as intended/accurate.

I will update this post with new information when it becomes available to me. If you have any questions or would like to add anything that you feel is missing from this list please feel free to let me know. If you have any comments, questions or concerns please feel free to ask.

Many members of the Emma Frost community would be more than glad to help answer your questions.

Omega Telepath:

This is her ranged/mental tree. Sudden Dread was moved to this tree and 2 new cooldown powers were added. Mental cloaking (a stealth that broke on power use) was removed from this tree and consolidated into a 3 second invisibility (which does not break on power use) on diamond mind.

Astral Bolt:
This is your range/mental basic power. It returns spirit on hit.

Psi Bolt:
This skill was upgraded from basic to spender status. This skill targets multiple enemies and the enemy that gets hit takes bonus damage.

For example say you have a boss. You aim this skill at the boss who will receive damage and any enemies (within a small radius) will also be effected by this power. The boss will receive bonus damage for being the enemy that is originally targeted.

Think Kinetic bolt except it's a small area and doesn't bounce.

Telepathic Torment:
This skill has not changed drastically. It should feel pretty much the same.

Psychic Blast:
This skill is no longer a dot. You may notice that this skill doesn't feel quite the same as it did previously. This skill is best utilized as a channeled area clear meaning you hold down the appropriate key to inflict damage on your target.

This skill still has trash clearing potential you just may have to use it differently than you're use to.

Sudden Dread:
This skill is pretty much the same. The duration on the effect of this power has been shortened. The dot on this skill is not stackable with Diamond Bladed Spin Kick

Drain Psyche:
This skill has not changed all that much. You should feel an improvement when using it. I believe the attack speed and animation have been adjusted to make channeling this power more fluid.

Astral Whip:
This is your high impact mental cooldown power. This skill will also significantly buff the mental damage your enemy takes for 8 seconds.

Psychic Spear:
This is your 4 second mental execute. This power requires a target for you to aim it so it does not go on cooldown and never misses. This skill is going to be easier to use on stationary enemies or bosses or just enemies that are easier to target in general.

Hellfire Headmistress:

This is her utility tree. All the powers that help Emma in some sort of supportive capacity are found under this tree.

Psychic Domination:
This skill is an automatic 1 point power. All of it's values are at their maximum rank at 1 point. You use this skill in order to dominate a minion. Once you have dominated a minion you do not need to use this skill again unless you wish you dominate a new minion.

To dismiss your current minion right click on this power and select to dismiss it.

Minion Less Pet Puff
There is intended to be a buff in damage and damage reduction to players not using minions. It should be displayed in the tooltip of this power.

Running in Heels:
This is her travel power. It is a sprint that costs 1 point. It has maximum travel speed at rank 1 and does not scale with + ranks to powers offered by items.

Telepathic Mastery/Force of Will:
This is her offensive passive. This skill is going to maxed in every build you run because it gives all her purely offensive stats that you typically look for.

The active effect of this skill is her crowd control which scales with how many ranks this power has.

This skills passive effects change based off of what form you are in.
You receive the constitution buff when not in diamond form and the accuracy buff when in diamond form. Crit ratings have been rolled into mental powers to balance the accuracy buff.

When in diamond form this a 5 second taunt gets added to the active effect of this power.

Frenzied Confusion:
This skill has not changed. It is her crowd control ability. With the limited power point at your disposal 1 point is really all this power needs. You can pretty much 1 point this and put it into any build rotation (if you have the bar space) although it may not feel as intuitive/fluid as just leaving it out in some melee rotations.

However it's a utility power that doesn't have a cooldown and is a 1 point wonder. I wouldn't overlook it but I wouldn't stress out over it if you aren't having room. Go with what feels fun or what you are having better results with.

Inspire Minion:
This skill now has a 30 second cooldown that is shared with Unlock Potential. This skill inflicts burst damage while also "inspiring" your minion who will taunt enemies for a short duration.

This is possibly the best option for those that wish to try full range/mental type builds. The range of your minion and the taunt that it applies means you can readily take advantage of your + damage to enemies not targeting you.

This skill does more out right burst damage than unlock potential.

Commanding Aura
The damage that commanding aura grants has been globally tuned. The attack speed buff that this skill provides has remained unchanged.

Kneel Before Me:
Emma's signature inflicts mental damage which many people hoping for a purely melee/physical build may be questioning. This is a pbaoe skill which is useful for melee/physical builds who tend to stay within close range.

This skill is also quite useful for restoring spirit. This skill offers invulnerability and health regeneration on activation. This skill is going to be good at disrupting the damage you take.

Unlock Potential:
This skill is her defensive steroid. It has a 30 second cooldown that is shared with inspire minion.
This skill provides both the conceal and protected buff.
The damage bonus on this skill does not scale with ranks. The damage bonus this skill provides does not get applied to the damage that this skill does.

This is a nice skill for melee builds. The concealed buff tends to counteract the in your face and "taunt" style that diamond builds are built around but the concealed buff is useful for any range/mental players that wish to utilize this skill.

The dot radius is fairly large on this skill especially compared to what it was on test center. Even when you use a range/mental build the mid range dot of this high cooldown power lines up with the mid range feel of her signature.

Diamond Paragon:

All the skills in this tree receive a damage bonus that scales with defense. This will most likely make people feel "tanky" when they gear for defense or aim for a mostly melee hybrid build.

You can no longer enter diamond form in hubs.

Lustrous Lunge:
This skill is her physical dash power. It will put you into diamond form upon activation. This skill provides a move speed bonus that scales based on power rank.

Diamond Mind/Diamond Heart:
[Bug]Diamond Armor resets when joining new instances. If you are in diamond form you revert back to human form every time to change maps/join a new instance.
[Bug]Diamond Armor also refreshes every time you join a new instance starting from 0 and building.
[Bug]When you die her diamond armor starts at 0 when you respawn.
This is her defensive passive. Diamond armor regeneration has been added to this skill. This skill changes based off of what form you are currently in.

In diamond form this skill offers the same benefits that it did previously. However when in non Diamond form the defense ratings on this skill are changed to dodge.

Gleaming Strike:
This is your melee/physical basic power. This power restores spirit on hit. No matter how I decide to incorporate this into my builds (or if I even decide to use it at all) I leave this skill at one point. There is no point maxing it.

Diamond Bladed Spin Kick:
This skill has a dot that does not stack with Sudden Dread. The dot on this skill is tagged as a bleed so it directly benefits from bleed itemization.
This skill has a small pbaoe/radius

Diamond Whirlwind:
This skill has many new affixes. This is a channeled power that can remain stationary or be moved by holding down your mouse and moving your cursor to the desired location.

Diamond Crush:
This skill now longer gives bonus damage against bleeding enemies. This skill has a shockwave type effect that makes it a bit farther in range than gleaming strike. It's not a huge thing but I hardly notice anyone mention it. When I use gleaming strike I have to get right up on the enemy. With diamond crush those huge blows give off a short wave of damage that makes it not require you to have to hug your target.

Crush is performing very well for me. This should be a nice spender option for those that wish to use it's impactful feel. The animation may be a bit slow for some people (especially when compared to gleaming strike) but you should still be able to get the most out of this skill.

I prefer gleaming strike (in some instances) just for that flashy animation.

The True Queen:
This skill is her 4 second physical execute. This power has a small area that it can hit targets within.

Showoff:
This is her high impact melee/physical skill. This skill has an 8 second cooldown that is shared with astral whip.

This skill gets bonus defense to match the 20% vulnerability that astral whip applies. All of diamonds have a damage bonus that scales with defense. So basically the + defense you get after using this skill is suppose to balance the +20you get on astral whip.

Ultimate:

Stepford Circle:
Emma no longer has a summon as an ultimate power (anyone miss the sparkle monsters? :))). She visually summons the cuckoos but this skill will not benefit from summoner gear.
Now she has a ground dot that gets placed where ever she channels it.

This means that Emma will cast this skill and the damage will stay in the spot Emma first activated this power. Meanwhile she is free to move about and do damage to her target(s).

For a more detailed breakdown of these powers read the patch notes here:
http://forums.marvelheroes.com/discussion/273303/marvel-heroes-2016-1-09-patch-notes