Witchwood Enemy Hero unbalanced

Witchwood Faceless enemy hero has a 0 COST mana hero power that upgrades any minion he chooses by 2-3 mana cost this is UNBALANCED and needs FIXING. By turn 3 I have to try and contend with 8 cost minion RNG or lose outright, it’s impossible to work around this as a player with RNG cards and drawing.