I think its Juggernaut, he is one of most iconic cards in the game, good for Campaign missions (to take down walls and buildings) and also good pvp card, his design is very unique, most battleforge/skylords reborn cards are unique in design, you cannot find more units like this, but Juggernaut takes some place in my heart, but i played a lot with frost too, i got lucky bombardier (or whatever he was called, this 120 2 orb frost card, when upgraded he had armor like avatar of frost which made him very strong in pvp but also he does well in pve)