Protector's Vow

Grants temporary HP that absorbs damage before the unit's real Health is touched.

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.

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.