Do triggered abilities with 'here' in their text (like Anivia, Warwick, or Volibear) remain legal if the unit is removed from the battlefield before the ability resolves?

Ruling: If a triggered ability contains "here" and the unit is removed from the battlefield before resolution, the ability cannot resolve because "here" refers to the unit's location, which no longer exists. However, "here" does not inherently target—whether an ability targets depends on its specific wording.

Sequence:

• Triggered abilities enter the chain when they trigger
• Targets are chosen at activation (if the ability targets)
• At resolution, the game checks if "here" (the unit's location) still exists
• If the unit has been removed or moved to a different location, abilities requiring "here" cannot resolve properly

Nuances:

• "Here" means "this unit's location" and does not inherently make an ability target
• If a unit is moved to a different battlefield location, targets become illegal because they are not at the same location as the unit
• Abilities like "When I attack, kill a unit" do not require the source to remain on the field to resolve
• For damage splitting abilities, targets are chosen at activation but how damage is split is chosen at resolution
• If a unit with "here" in its ability (like Vanguard Captain) is moved while the trigger is on the chain, the effect resolves at the new location; if removed entirely, it resolves to no effect