As your character improves you can improve upon these powers allowing for example
the retention of gained powers for longer.
 

Macrophagy eat parts of other and use them on yourself.   The quick version allows
you to bite or rip parts off others, swallow them (or attach if part to be used is external) and use
these new parts  immediately.   The slow version requires parts to be swallowed and takes several
hours to work (more if part is very large).

Example:        Shamash the Titan has spotted that Adad, a myriad limbed demon, has a rather
                        large stinging tentacle which Shamash has heard is rather deadly.  Whilst Adad
                        is eating floating algae Shamash slips out of his favourite dimension for travel using
                        his dimension limbs and siezes Adad.   Shamash rips Adad apart before Adad's
                        herd mates can respond.   Shamash who has Quick Macrophagy attaches Adad's
                        stinging limb to himself and uses it to fight off the angry herd.

Heads and brains can be attached but there is a danger with that heads with superior psyches to
your own could leave the new brain in charge.  New minds will normally deteriate in a few days
so you may end up back in charge.   Using new brains is slower than other organs.

Example:        Shamash is travelling in a Black Zone shadow and hears about a local wizard.
                        Fancying aquiring the ability to cast spells for awhile Shamash seeks him out.
                        The wizard is in his lab when Shamash simply smashes through the wall, grabs
                        the wizard and bites his head off.   Shamash swallows the head and after a little
                        internal reorganisation has established the nerve paths to control it.  Shamash
                        spends a few happy hours blasting off spells.   Later Shamash is sleeping but
                        the wizards brain has retained its high psyche and starts giving him nightmares.
                        Shamash wakes up and decides to spit the head and go look for something else
                        to do.
 

Formphagy eat others and you can assume their form.  You can gain their external
powers such as armour.   You will gradually lose the new abilities depending on how often you
shapechange into other forms.
 

Cellphagy eat others,  after carefully digesting them you can distribute their cells
around your body and retain parts of their brain allowing you to use their internal powers such as
dimensional projectile.   As your bodies immune system breaks down these foreign cells you will
gradually loses these gained abilities.
 

Genetophagy after eating others you can add their genetic material to your own.
With this you can gain others natural abilities and forms.