Spell shields refer to one of several effects that have the capacity to negate hostile abilities from applying to the recipient. This can vary per case with other included mechanisms such as 
on-hit effects and subsequent targeting (
Bouncing).
General
- Spell Shields negate effects coming from champion abilities,
monsters and items, with the exception of summoner spells and persistent damage from AoE DoT and passive DoT effects.
- Spell Shields take priority over health shields and conditional crowd control immunity ( Black Shield, Void Shift, etc.).
- Multiple active Spell Shields over a single unit will break simultaneously. This is intentional.
Single ability
The following will block one enemy ability, with precedence given to the ability spell shield. If the ability is of an enhanced basic attack (e.g. 
Harsh Lesson, 
Power Fist) the spell shield will not block the damage of it, but only any additional effect it might have, like 
crowd control. In the case of Harsh Lesson, the spell shield breaks even if the attack doesn't have any crowd control effect with it.
Champion abilities
Items
Other
These effects can block more than one ability per cast.
Gameplay Elements
| Targeting Types | Auto (Passive · Self) · Direction · Ground · Unit |
|---|---|
| Unit types | Champion · Minion · Monster · Pets · Structures (Turret · Inhibitor · Nexus) · Terrain |
| Effect types | Ability effects · Attack effects (On-hit) · Area of effect · Damage over time · Heal · Multi-hit · Redirected damage · Shield · Single-targeted |
| Ability types | Aura · Blink · Buff · Combat status · Crowd control · Damage (Ability · Basic · Magic · Physical · True · Nexus Obelisk · Execution) · Dash · Debuff · Invulnerability · Pet · Sight · Spell shield · Untargetability · Ward |
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