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Hulk Buff (very simple)

Furys No longer fall off over time (unless an opponents abilities cause them to do so, in which case that ability accuracy is reduced by no less than 20%)
Hulk gains a regeneration buff that lasts for 10 seconds and heals 1% health per second. Cool down time is 10 seconds
Opponent abilities can remove this buff
If 4 or more furys are active, Hulk becomes unstoppable and special attacks unblockable for 6 seconds. This can happen once for every 30 hits on the combo meter.
Hulk gains a regeneration buff that lasts for 10 seconds and heals 1% health per second. Cool down time is 10 seconds
Opponent abilities can remove this buff
If 4 or more furys are active, Hulk becomes unstoppable and special attacks unblockable for 6 seconds. This can happen once for every 30 hits on the combo meter.
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Comments
It true that the (Earth-616) Hulk in the comics does regenerate.
The MCOC Hulk might be better suited to gaining Physical Resistance with falling Health, as well as the damage boost. That way, he's a bit more sustainable at lower health levels.
Still, there's always those fun synergies he has with Thor Ragnarok to fall back on...