Rod of Spider's Strength

Rod of Stolen Strength - Requires Attunement by a Warlock
This pure-onyx rod is topped with the form of a creature whose top half is a beautiful woman but her bottom half is that of an eight legged spider. The rest of the rod is covered in spider webb patterns.
  As an action, once per long rest, gain a number of Spell Points equal to the highest spell level you can cast from your levels in Warlock.
1st level = 2 points (Warlock levels 1-2)
2nd level = 3 points (Warlock levels 3-4)
3rd level = 5 points (Warlock levels 5-6)
4th level = 6 points (Warlock levels 7-8)
5th level = 7 points (Warlock levels 9-20)
 
When you kill a creature, you main gain a bonus based on one of their creature types for 10 days or until you replace the bonus with another one.
Humanoid = +2 to Intelligence
Beast = +2 Wisdom
Undead/Monstrosity = +2 to Constitution
Giant = +4 to Strength
Fey/Dragon = +2 to Charisma
Celestial = The ability to use the rod as an action twice per long rest
Fiend = Immunity to Poison and Fire
Ooze = The ability to squeeze your person and equipment though spaces as small as one inch
Aberration, Construct, Plant = Nothing