Work is slow today... :)
Decay Familiar
Trains 100% of its level as HP
Trains 25% of its level as decay
OR
Trains 75% of its level as HP
Trains 25% of its level as decay
Regenerates 3% of its HP every round (up to max health)
A little different from whats on the tattoo market these days. I don't know if I would use something like that, but I am sure some one could make a killer strat with one :D