Verified for patch 16.8.1

Dawncore

Reduce the holder's max Mana by 10. Subsequent spellcasts reduce max Mana by 10%, to a minimum of 10.

Source

Artifact

Effects

AD: 0.2
AP: 20
FlatManaReduction: 10
MinimumTotalMana: 10
ReductionPerCast: 0.1

Dawncore enables

Mana On the Menu

The unit-level resource that gates ability casts. Mana-gen items, on-cast refunds, and starting-mana augments all key off this mechanic.