The Tablet of Ruin is the Artifact for Episode: Heresy, which provides Guardians with certain Artifact Perks that can be used to gain an advantage when fighting combatants.
Obtaining the Tablet of Ruin is one of the earliest activities that you do, which is part of Act I: Echoed Warnings. (Episode: Heresy Quest)
Once you have gotten your hands on the Tablet of Ruin, you can start gaining XP for it to boost its level, which will allow you to unlock more Artifact Perks.
How To Get Tablet of Ruin?
The Tablet of Ruin is obtained during Quest Step 4 of Act I: Echoed Warnings (Episode: Heresy Quest) where you return from Oryx’s Dreadnaught.
You obtain the Artifact during the earlier parts of the episode in the Recce mission, where you are making your way to rendezvous with Drifter and Eris.
How To Level Up Tablet of Ruin?
The Tablet of Ruin gains XP based on the amount that you gain, which makes it important to obtain this artifact before doing anything during Episode: Heresy.
A good way to quickly level up the Episode Artifact would be to grind activities that provide you with a large amount of XP since the artifact gains XP based on a portion of what you receive.
Artifact Power Bonus
As the Tablet of Ruin Artifact gains levels, you will also be provided with a bonus in your Power Levels, which is important in improving how efficient you will be in a mission.
Your total Power Level affects the damage that you deal with enemies and your defense, which affects how much damage you can endure.
The Power Bonus provided by this artifact is added directly to your current Power Level, which makes it a huge boost once you have gear that also has a higher Power Level.
Verdict
Since the Tablet of Ruin can be obtained early in Episode: Heresy, you can start leveling it up right away regardless of what activities you do.
A good idea would be to focus on the Episode Activities since these tend to be more rewarding and you can progress with the episode quest as well.
The higher the level of your Episode Artifact, the more Artifact Perks that you will have unlocked and will be able to equip to enhance your builds.

