I would like to hear your opinion about this card.
So far I find it quite bad. Four resources is very expensive for a hero who has a hand size of only 4. Additionally, in order to be comparable to other damage-dealing hero signature abilities (Photonic blast, Swinging web kick or Supersonic Punch) you need to have suffered 10 - 11 damage, which makes it a very situational card.
May be in the future there will be cards that increase the health pool of the here, may be then....?