Hello,
On the book of Force and Destiny I can't find the part that shows the Dark Side Force Power Tree.
I woud like to know how to use the force power "choke" (darth vader) or "electrocute" (darth sidious), for example.

Thank you for any help!

Pretty sure force choke can be pulled off using the Bind power (at least, its later upgrades, that deal wounds), and force lightning is (if I recall), the upgraded form of Unleash (think thats what its called at least).

Force choke is covered under the Bind power by using black pips to generate your Force points, especially so if you include Mastery Control Upgrade to inflict a critical injury.

Force lightning is the domain of the Unleash portion of Protect/Unleash, but it takes some heavy investment in the power and in the Discipline skill to make it a powerful attack.

Yep. Donovan is correct. To add to that, Unleash's Mastery upgrade is specifically stated to be Force Lightning in the book. To quote:

Quote

Mastery: the Mastery upgrade has different effects for Protect and Unleash.

Unleash: This uprage represents mastering the ultimate Dark Side technique, the dreaded Force lightning. If the user is a dark side Force user, he may spend FP to reduce the attack's critical rating to 1.