Why would anyone pay 5

for 4HP even if it could also be a creature? We already have Heal (2

for 20HP)
I would recommended changing it to
Cost: 4/4
Stats: 3|2 / 4|2
Skill:

: Sacrifice and Heal 20HP
That way it costs 2

too many to be an efficient creature and costs 3

too many to be an efficient Heal.