The Colossus of Akros from Mythic Odyssey of Theros is the latest addition to the Hotlist. I’ve only had the chance to run this gargantuan construct a few times in the Coliseum, but it has never disappointed.
The Colossus is great on it’s own. It has ranged and melee attacks, both of with a +16 attack bonus. It has a recharging attack that can hit 3 targets and sets them on a fire when the save is failed. It’s 21 AC give it a chance of occasionally not being hit at higher levels. Last but not least, when it dies it showers a 30 foot area around it with flaming-bludgeoning damage.
Colossus of Akros and Friends
But wait, there’s more! When it takes fire damage, it regains hit points. Fire is a relatively common damage type, but even so, you’re players are probably only going to make the mistake of healing it once. After that, the fun is over, unless you stack the deck in your favor a little bit.
Throw that colossus in an encounter with something that does bottomless fire damage. What if the colossus has a flock of red dragon wyrmling that roost on it? They’d be pretty pissed when you disturbed their home, I’d imagine, and do everything they could to stay out of your range while healing the colossus with their loving exhalations. Another option would be a pit fiend or a death slaad that lives in the area. Both have the fireball spell at-will. They could heal the colossus while also hitting the PCs with the splash damage.