If an opponent plays Void Seeker (dealing 4 damage) on my Thousand Tail Watcher, then plays their own Thousand Tail Watcher (giving -3 might to all units), does my Watcher die?

Ruling: Yes, the Watcher will die. The unit has a 4 damage marker on it, and when the opponent's Thousand Tail Watcher enters and reduces all units' might by 3, your Watcher becomes 4 might (7-3). Since it has 4 damage marked on it and now has 4 might, it dies because damage equals might.

Sequence:

• Void Seeker deals 4 damage to Thousand Tail Watcher (7 might), placing a 4 damage marker on it
• Opponent plays their Thousand Tail Watcher, which gives -3 might to all units
• Your Watcher is now 4 might with 4 damage marked
• The unit dies when damage marked equals or exceeds its current might

Nuances:

• Damage markers do not reduce might; they are tracked separately
• A unit dies when damage marked equals or exceeds its might
• This same principle applies to other combinations (e.g., damaging Watcher with Hextech Ray then using Smoke Screen to reduce might)