Non-targetable

Untargetability is a mechanic that makes the unit untargetable.

Unselectability
Unselectablity makes the unit not selectable, and selectable only in a few cases. Most abilities/items treat unselectable units as if they were invisible, except a few cases. Some sources of unselectability may remove a unit's Hitbox, grant attack immunity, may prevent allies or enemies or both from targeting them.

Although Hide sources also cause the unit to be unselectable and untargetable, they are considered a different mechanic.

Target Unit
While most unit targeting abilities cannot target unselectable units, there are a few particular exceptions.

Spell Reflection sources, and abilities with an instant cast time that does not require facing the target while casting, can fully target unselectability from,  and.

Non-Unit-Targeting Abilities
Additionally, most abilities also treat unselectable units as if they were invisible. Generally, abilities that do/don't affect invisible units also do/don't affect unselectable units. For example, neither bounces to invisible units nor unselectable units;  neither strikes invisible units nor unselectable units.

However, the following abilities interact differently with unselectable units:

Non-targetable 不取对象