Xenric Vell's Heart of Fire

Caster becomes immune to fire damage, resistant to slashing and piercing, and vulnerable to water damage (DIS on concentration if attacked with a water spell.). Whenever the caster is hit by a melee attack within 5 feet, the attacker receives 1d6 damage.

Grant the caster an extra bonus action or reaction every round.

All other fire magic attacks are magnified by 1d6 of damage.

When Heart of Fire is ceased, the caster must spend 2 rounds recuperating (caster may make one move or one standard action each round).

Can cease heart of fire by casting Flame Strike without utilizing an additional spell slot. The Flame strike emanates from the caster but otherwise all dimensions are the same.