Overview
Helena is a rare fire Warmage, she is likely one of the early fire heroes you will get.
Fuel the Fire slowly covers the board in fire terrain, this works well with units that benefit from fire terrain like CU001 who gains attack per fire terrain.
Dying Flame works well with attack buffs, Helena can just sit in the back row dealing 100% attack to all enemies whenever the board changes to fire.
When she is commander, Fuel the Fire will spread quickly, covering the board in 2-3 turns and it provides double the amount of damage or healing
Special - Fuel the Fire
156% attack to target. Creates fire terrain that spreads every 3 turns and lasts for 7 turns
Passive - Dying Flame
On color match, burn all enemies for 100% attack
Commander - World on Fire
[Self] Fuel the Fire spreads instantly and fire terrain deals increased damage