Cho'Gath

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.

How a unit chooses what to attack or hit with an ability. By default a champion attacks the closest enemy by hex distance and keeps hitting it until it dies or moves out of range, then retargets to the next-closest enemy. That default is why frontline placement matters: a tank parked up front soaks the enemy carry's attacks while your own backline carry is left alone. Some abilities override the default with a special selector that picks a different enemy: the lowest-Health target (Gwen snips the lowest percent-Health enemy; Cho'Gath eats the lowest current-Health enemy in range), the furthest enemy (Pyke harpoons across the board), the highest-Health enemy (Blitzcrank's bolt), or the largest clump of enemies (Blitzcrank's disco ball). Untargetable and Stealth remove a unit from the pool of valid targets entirely.

The carrier gains a permanent stack on each takedown (kill or assist) and keeps those stacks across rounds, unlike in-combat stacking which resets. Set 17 Ezreal is the headline example: every 8 takedowns earns him a permanent damage drone, so early-round farming compounds into late-game burst.