What stats does Innervating Locket give?

Innervating Locket grants 150 HP and 2 Mana Regen.

What kind of item is Innervating Locket in TFT?

Innervating Locket is an Artifact item in TFT.

The holder gains 1% of their total Mana whenever they're hit by an attack.

artifact

The holder gains 1% of their total Mana whenever they're hit by an attack.

Each cast restores 20% of the holder's max Health over 3 seconds.

Mana

The unit-level resource that gates ability casts — champions cast once their mana bar fills, so low-mana units cast more often than high-mana ones. Spear of Shojin (mana per attack) and Adaptive Helm (amplifies Mana from all sources) push casts faster, alongside starting-mana augments. Blue Buff is no longer a mana item in Set 17 — it's now an AD/AP amp.
Heal

Restores Health to a unit, capped at maximum HP.
On Cast

This effect triggers the instant a unit casts its ability. Items like Lich Bane and Innervating Locket reward you for landing as many casts as possible.

Max Health

Grants the unit additional maximum HP, either flat (like +150 Health) or percentage (like +6% max Health). It comes up whenever you stack Giant's Belt items, pick health-boost augments such as Yasuo's Golden Hex or Giant and Mighty, or play Cho'Gath, whose cast permanently raises his own max Health every time he eats an enemy. For the cross-round permanent stat-stacks angle specifically, see the dedicated permanent stat-stacks page.