The health shard is a complete joke.
15-90 HP based on level.
Mini Gnar has the lowest base HP at level 18 in the game: 1615. If for some reason he doesn't buy a single point of HP, this shard would mean a 5.57% increase in health.
Anivia has the lowest base HP at level 1: 480. Removing Doran's from the equation, the shard gives her a 3.12 % increase in health.
I can joke about playtesting, but it's obvious that this shard is mathematically shit even in best case scenarios.
you
get
damage
from
defense.