So, it’s still possible to equip your Heart of Azeroth in SL. And the effects on it are still usable.
This means you can use it for good on level 60 characters.
The Crucible of Flame
Concentrated Flame: Blast your target with a ball of concentrated flame, dealing 468 Fire damage to an enemy or healing an ally for 468, then burn the target for an additional 75% of the damage or healing done over 6 sec. Each cast of Concentrated Flame deals 100% increased damage or healing. This bonus resets after every third cast. Max 2 Charges.
Ancient Flame: Your spells and abilities have a chance to cauterize your target for 1,174 Fire damage over 10 sec or to heal an ally for 1,174 over 10 sec, stacking up to 5 times.
Vision of Perfection
Strive for Perfection: Reduces the cooldown of Avatar by 10.0%. When you activate Avatar, immediately heal for 5% of maximum health.
Memory of Lucid Dreams
Lucid Dreams: Your spells and abilities have a chance to refund 50% of the Rage spent on them, heal you for 814, and increase your Versatility by 31 for 8 sec.
Sphere of Suppression
Sphere of Suppression: When an enemy melee attacks you, their movement speed is reduced by 30% and you gain 27 Haste and Speed for 7 sec.
Equip: Harnesses the energy of raw Azerite, awakening exceptional pieces of armor that possess latent powers.
Requires Level 40
This makes the heart basically better than any legendary from SL and gives some classes extraordinary damage and survivability.
Using this on a protection warrior healing you for 75% of the damage done on a very low cooldown for example and never running out of rage.