Pact of the Bone
Your patron has granted you authority over undeath. You can cast animate dead without expending a spell slot or spell components to animate 1 corpse or reassert control over 1 undead creature. Undead animated using this effect have half the maximum hit points normal of a normal undead of their type. After using this ability, you may not use it again until you finish a long rest.
Pact of the Flame
When you cast a cantrip that deals damage on your turn, you can, as a bonus action, choose to lose a number of hit points, up to half your warlock level (maximum 5), to imbue this attack with fire. The cantrip deals an additional amount of fire damage on a hit equal to the number of hit points lost. You may not regain hit points lost with this ability with magic effects.
Pact of the Key
You patron has opened the doors of reality to you. As an action on your turn, you can teleport a distance up to half you movement speed. If you teleport into a space that is already occupied by an object or creature, you take force damage equal to the number of feet traveled and are shunted to the nearest unoccupied location.