Skull Storm

When you cast this spell, copy it for each time you've cast your commander from the command zone this game. Each opponent sacrifices a creature of their choice. Each opponent who can't loses half their life, rounded up.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o2hql0jmjpb1h3p7tpo4q.