[NEW] Israfel first pass

Israfel, the level 4 angel. Implemented:
* Israfel
* Ability to split into Isra and Fell
* Healing as Israfel
* Blinding attack and burning defence as Israfel
* Fell benefits from Isra's concentration
* Israfel's prose

To do:
* Reuniting
* Isra and Fell: special abilities and prose
* Power
* Special stuff an