REX: Full of Life

 is a challenge in Risk of Rain 2. It is completed as by healing 1000 Health in a single tick.

Tips

 * The player does not need to be at low health - getting 1000+ healing even at full health completes the challenge.
 * The easiest way to achieve this is to combine a with, which will heal 100% of the player's max health in a single tick. Using the  with the Rack has the same effect. As long as the player has 1000 health or more, this will complete the challenge.
 * Getting a few can help to reach this max health value faster.
 * Barriers are counted as max health.
 * For to heal 1000 health in a single tick, it needs to root a large group of enemies. It also needs multiple Rejuvenation Racks.
 * is not recommended. Even with a large group of enemies, the healing from each enemy will be treated as a separate tick.