Treasure Chest Fang

When you cast this spell, you inscribe a glyph that triggers an effect decided upon casting. This can be done in one of many ways:

Mimic Chomp: The spell is primed when the box opens, and triggers when it is blocked from closing. The spell has the caster's INT modifier charges and recharges when the caster takes a Long Rest.

Sigh: The spell triggers in gradients depending on how widely open the box is, compared to its maximum. If Heat Metal is used on a metal chest for example, only half damage is dealt if its lid, or "mouth", is open halfway. The spell has the caster's INT modifier charges and recharges when the caster takes a Long Rest. 

Silence: The enchantment is permanently active, but only if the container is closed. Opening the box halts the spell effect, and it only reactivates when the box is closed again.

Scream: The spell triggers when the box opens fully. The glyph must be recast each time it is activated.

Regardless of choice made, the spell effect can only be a modification (natural roll disadvantage) or a spell effect or artifact enchantment the artificer is aware of (normal roll).

The spell is easily visible as a glyph when the spell is active.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, damage (if any) increases by 1 die for each slot above 3rd.