Catwoman is required in all matches of battle 5.
Challenge: Radiation! (1% max health lost per second)
Challenge: Power Surge!
Challenge: Super Move Disabled!
Challenge: Regeneration! (enemies heal by 1% max health every second)
Challenge: Radiation! (1% maxhealth lost every second)
The Vampire modifier in this match appears to be a very weak version of the common Life Drain modifier. It cannot heal Red Lantern Hal.