Sereph Moltenheart

+1: Target player may sacrifice an artifact they control. If they don't, Sereph Moltenheart deals 2 damage to that player.
-2: Sereph Moltenheart deals 2 damage to up to one target creature. If that creature is an artifact creature, deal 3 damage instead.
-6: Exile all artifacts. Sereph deals damage to each opponent equal to the total converted mana cost among permanents they controlled exiled this way