Mindblade Render

Creature — Azra Warrior

Whenever your opponents are dealt combat damage, if any of that damage was dealt by a Warrior, you draw a card and you lose 1 life.

Mindblade Render's ability triggers only once, regardless of how many opponents were dealt damage, how much damage they were dealt, or how many Warriors dealt damage.
Mindblade Render's ability triggers if a Warrior an opponent controls deals combat damage to another player who's also your opponent. You can't choose not to draw a card or lose 1 life if this happens.