Thomas Cassidy

Organic thermokinetic blasts: Cassidy has the ability to generate blasts of concussive force or heat by using wood as the focus for his power. Following genetic engineering, Cassidy could channel the energy he generates directly through the parts of his body that were grafted to a wood-like substance.

After being seriously injured by Nathan Summers, Cassidy's body was healed by an artificial wood-like growth introduced into his body. This substance initially served as a focus for his bio-blasts and later gave him plant control abilities. The substance was surgically removed after another series of injuries, reverting him to his previous look. Later, Cassidy underwent a secondary mutation which naturally recreated and improved upon the plant powers he previously artificially had.

Organic plant form: Genetic immunity: Cassidy is highly resistant, if not immune, to Sean and Theresa Cassidy's sonic screams and they are similarly protected from his bio-blasts.
 * Plant growth: Cassidy can grow to immense sizes.
 * Superhuman strength
 * Regenerative healing factor: Cassidy can regenerate damaged or destroyed body parts with great speed.
 * Chlorokinesis: He can mentally control all plant life within his vicinity.
 * Plant consciousness: He can distribute his consciousness amongst the plants he controls.
 * Life-force absorption: He can drain the life-force of organic beings.

After M-Day, Cassidy seemingly lost all his powers and reverted back to a normal human appearance. However, he has since demonstrated both his bio-blasting and plant control abilities.