How to model a kinetic energy absorbing power?

[Deathwindfr]

Dear all,

I would like to model a cinetic energy absorbing power.

The power allows the character to absord cinetic energy from physical attacks against him. This allows to reduce the damage against him.

He can then use the gained energy to increase the damage of his own physical attacks.

How would you model this power? Which advantages?

Thanks in advance for your ideas.

Cheers.