Drake Sypher

From Loonipedia

Drake Sypher (voiced by Phil LaMarr) is commonly referred to as simply "Sypher," he is a villain with the power to absorb the abilities of others into himself through touch, not only super-powers, but also the natural abilities of living creatures. The disadvantage is if he's touched again your powers will come back to you.

In the episode Sypher he absorbed:

Ace's Laser Vision
Tech's Magnetic Powers
Lexi's Brain Blasts
Duck's Quantum Quack and Eggs
Slam's Tornadoes
Rev's Speed

He was desperate to keep his stolen ability's, and stated he hated being powerles like those he had absorbed.