Saddle of Shared Pain

Wondrous item, common (requires attunement by a ranger)

This sleek black saddle has tiny red veins that travel along its surface, pulsing whenever a creature wearing this saddle takes damage. When you put this saddle on a beast and are within 10 feet of that beast, as a reaction whenever you would take damage, you can transfer to that beast an amount of damage equal to its Hit Dice. Alternatively, if the beast takes damage when you are within 10 feet, as a reaction you can transfer a number of hit points to that beast equal to your ranger level, restoring twice that n u m b e r of hit points to that beast.