Nora Cost: 95
Mangleshell was even stronger at release, with Debilitate ticking every turn instead of every other turn. However, he remains the best Tortun hero.
Recommended Build: Debilitate/Tariff
Mangleshell is the only Tortun unit that works best when used aggressively. He repays a significant portion of his cost upon his death, so long as you can get the X, but more importantly Frightful Blows prevents the units that he attacks from hitting him back. Like the Slamhammer, he is very easy to use, so I'll instead focus on some common mistakes I see people make when using him.
1) Soloing multiple, cheaper enemies. Mangleshell shines against fewer, stronger opponents rather than an array of weaker units. He both reduces the damage of the target and prevents it from targeting him; however, he can't spread around his fear easily due to his middling speed and ponderous
2) Forgetting about Cleanse. While this is fairly minor as far as calculation foibles go (like forgetting to always take off 10 HP when fighting against KF), you need to remember that frightened units are not dead units and many factions will still be able to focus-fire Mangleshell on the following turn.