Balance suggestion

I want to point the overpowered ability of the commander.
Combined with valen double shield, it becomes absolutely horrendious. Everybody is complaining about that meta deck. Whatever is the ascension, this deck is absolutely meta and dominating. Of course, some heros can counter it with their spells, but if this commander is launched at the right time, it changes line while we launch our spell in an empty line. Then its game over. This deck is a way too fast.
Cant you put a +2 cost on this unit please? 3 cost is obviously underrated. 5 would be much better.
Thanks for thinking about that.