Heal crystal gives instant heal and regeneration in radius of 3 blocks.
Damage crystal gives instant damage and poison in radius from 3rd to 7th blocks.
Undying crystal gives effects of totem of undying in radius of 3 blocks.

Heal crystal gives instant heal and regeneration in radius of 3 blocks.
Damage crystal gives instant damage and poison in radius from 3rd to 7th blocks.
Undying crystal gives effects of totem of undying in radius of 3 blocks.