So way back when Old Man Logan's abilities were teased, I remember this guy being speculated at. I had never heard of the character so I looked him up, and I've always thought his power set would make a great 5-star character. I've taken a stab at it below.
Elixir (Joshua Foley)
5 Star Rarity (Epic)
At Max Level: HP: 42474 620/80/515/73/582/4.3x
Resurrection 10 AP
As long as a spark of life remains, Elixir can bring his fallen allies back from the brink. Restores a downed ally to life with 3000 Health. This drains Elixir's strength, stunning him for 4 turns.
Death Touch 14 AP
Enraged by attempts to harm his friends, Joshua loses control. He viciously assaults an enemy's body with tumors and necrotic tissue, blackening his skin and altering his powers. Deals 20% of the target's max HP as damage and permanently changes Elixir's powers. If one of Elixir's allies is downed or below 20% health, deal 35% of max HP. If both are downed or below 25% health, deal 60%.
Healing Aura 8 AP
Elixir focuses on mending his team's wounds, keeping them in fighting shape. Creates a blue Countdown tile that activates every 2 turns, giving Elixir's team a burst of 400 Health. If Elixir transforms, all Healing Aura Countdown tiles are removed.
Fester PASSIVE
Elixir besets his enemies with crippling diseases and afflictions, rapidly draining their strength. When you match Yellow tiles, create an Attack tile of strength 125.
Necrosis PASSIVE
Elixir degrades his enemies' bodies and aggravates their wounds, hampering recovery. When you match Black tiles, create a 2-turn Countdown targeting the enemy in front that deals 525 damage. While this tile is active, that enemy cannot be healed.
Wither PASSIVE
Elixir withers his enemies' nervous systems and saps their strength, reducing their ability to fight effectively. When you match Blue tiles, reduce an enemy Attack, Protect or Strike tile's strength by 55.