What it does
"Healing Tears" isn't a real Magic keyword or ability—it doesn't appear on any card or in the comprehensive rules. You may be thinking of a card name or confusing it with effects from another game.
If you're looking for lifegain in Commander, the relevant mechanic is lifelink, which causes damage dealt by a source to gain its controller that much life. The common mistake is thinking lifelink "triggers"—it doesn't; it's a static replacement-like effect that applies whenever damage is dealt, including combat, abilities, or even noncombat damage like pinging.
If you saw "Healing Tears" somewhere specific, double-check the exact card name on Gatherer or Scryfall. If you tell me the actual card or effect you mean, I can break down how it works and where it shines in EDH.
