How It Works: Tiefling Spell-Like Ability Replacement Alternate Racial Ability

[Alphavoltario]

Specifically healed by both positive and negative channeled energy.

1.) Does this ability only interact with the Channel Energy ability? (Assuming yes.)

2.) Assuming the answer of no to question 1, if the tiefling in question picked up negative energy affinity by some means (i.e. Necromatic Affinity [Listed Below]), would the tiefling be able to still be healed by cure/inflict meant to heal, and damaged by cure meant to harm?

Necromatic Affinity:

Long exposure to necromantic energies has granted you a small measure of resistance against them.

Prerequisites: Con 15.

Benefit: You gain a +2 bonus on saving throws made to resist spells and effects that utilize negative energy, cause negative levels, or cause ability damage, ability drain, or ability penalties. In addition, damage caused by inflict spells heals you as if you were an undead creature, but you also take damage from cure spells.

[Diego Rossi]

Variant Tiefling Abilities: roll of 49 wrote:

You are healed by both positive and negative channeled energy.

It interacts only with channeling. Necromantic affinity would work as written, nothing changes when you have both.