Red dots = Where heroes would stand
Another level design idea - Deserts! These hot and hostile environments would host a variety of baddies, mainly Light/Fire/Dark enemies. It would also be a neat way to add in Leonidus and Snake Sister clones to the game!
Here's some enemy ideas and their abilities:
Lionheart Incinerator (Red Leon clone)
Sun Burn Blast - Copy of Leonidus' Sun Worship, but Burns instead of adding Magnified Light.
Burning Mane - Copy of Leonidus' Divine Inspiration, but instead of healing provides Burning Skin III and Burn Immune. Still gives an attack buff.
Lionheart Harbinger (Purple Leon clone)
Solar Eclipse - Copy of Sun Worship, but Silences instead of applying Magnified Light.
The Harbinger - Copy of The Guardian, but applies Disease Skin II to the enemy using it instead of giving his team Anti-Magic Aura.
Sand Serpent (Yellow Viperia... Or Cobressa, I guess)
Vipers on the Sand - Copy of Snakes on the Plains, applies Magnified Light instead of Venom.
Snake Charmer - Copy of Reptile Pile, basically does the same thing.
Cursed Mummy (Red Hansuke)
Possession - Looks like Vigilance, but works by making one of your heroes Possessed. While possessed, that Hero has a chance to hit both its target and a random ally hero when using basic attacks. Lasts 3 turns.
Exposed Curse - Like Expose Weakness, but uses own HP to place a Curse on its target and do damage. The curse prevents the hero from using basic attacks for one turn. If they cannot use an ability, their turn is skipped.
Pyramid Queen (Yellow Ella clone)
Walk Like an Egyptian - Struts forward and charms an enemy (one of your heroes) with her dance, making them attack all their allies. It doesn't do very much damage, but has a chance to add a passive to each of your heroes that reduces Healing AND Crit!
Desert Ritual - Cuts own HP and Possesses an enemy (again, one of your heroes).
Oasis Giant (Blue Phemus clone)
Desert Tremors - Like Phemus' Earthquake ability, but has a chance to add Off-Balance to all enemies!
Mirage - Sorta like his taunt, but for an ally. Buffs their HP and applies a taunt. Also gives Evading.