Vampiric Hunger: Morbius begins the game on click #3. Morbius can use Steal Energy and may use it to heal beyond his starting line, up to click #1.

No Vampiric Weaknesses: Characters can't target Morbius with Exploit Weakness.

Antibody Serum Creator: Morbius can use Outwit. When he uses Outwit to counter a power that isn't a defense power, counter that same power on each other opposing character within 10 squares and line of fire.

I thought characters couldn't be healed past their starting lines. Has that changed?
No, it hasn't changed. Generally speaking, characters can't be healed past their starting lines. However, that rule is not one of HeroClix's Golden Rules, so it may be broken with the proper game effect. Vampiric Hunger provides an exception by which we can break this rule.

So if I use Steal Energy and heal Morbius past his starting line on click #3, can I then use Support or something similar to heal him all the way to click #1?
No. The only way he can heal past his starting line is with Steal Energy.