Whenever Cares About Creature Types Test 1 deals combat damage to a player, if Cares About Creature Types Test 1 is a Cleric, you may pay
. If you do, gain 3 life.
Whenever Cares About Creature Types Test 1 becomes enchanted, Cares About Creature Types Test 1 becomes a Cleric until end of turn.
The abilities here represent preliminary design space of this concept.
The first disappointment is that I'm don't have a name for the first ability, and wonder if there even should be an ability word name for the first ability.
The second limit is that as currently is, would force 2-color cards and archetypes which is not something I'd desire for this set. The first alternative, would be to replace "pay
" with "pay 
" and at least allow for three colors. From this, the next logical step would be to figure out what colors each [job] creature type would be, though it would be heavily based on the current color associations already in existence.
The final ability is not indicative of how each creature would have access to gaining another creature type. I haphazardly selected "become enchanted" because it's both general and still slightly white feeling. "Gained life this turn" would have worked, but just felt redundant with the first ability being the potential to gain life. Generic abilities for other creature types could be "Cast an instant or sorcery spell" to become a Wizard, "Dealt damage to a creature" to become a Warrior.