Non-targetable

Untargetability is a mechanic that makes the unit untargetable.

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

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

Directly Unit-Targeting
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.

Secondary Targets
Additionally, most abilities also treat unselectable units as if they were invisible. Generally, abilities that do or do not affect invisible units also do and do not affect unselectable units respectively. 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:

Невыбираемость 不取对象