Lemure

Lemure is the OG HP/Def based explosive champion within the game even though technically speaking his main type of damage is ATK based. There is currently a Stronghold bonus in Siege mode for a champion with an ability like this, despite there only being one other (brand new mythical champion) at the time of this writing that it fits. Does that make Lemure special and/or powerful for you to use in early game pvp? Not necessarily but it does make him unique. However he is still not special enough to want to build at any point in your account unless you absolutely needed a bomb champion and you were completely desperate. His A2 ability is on a 3-turn countdown timer, which is quite long and he doesn't have any other abilities to help decrease it any faster.