So glad the algorithm sent me this video. Without having played at all, here is my Assassin idea (since i have minis for it)
Assassin
Life 4-5
Move 4
Attack 2
Reach 1
Abilities
Withdraw - If you have not moved a figure this turn, the Assassin may move 1 tile in any direction, including diagonally.
Poisoned Dagger - The figure attacked by the Assassin take an additional 2 damage at the end of your opponent's turn (or 1 damage at the start of the turn indefinitely until healed).
No idea if it's balanced at all.
Oh and I'm wondering your thoughts on rolling a d4 & d8 to randomly place the terrain pieces in the neutral area.