Arcane Duel

Flash
When Arcane Duel enters the battlefield, counter target noncreature spell. If a spell is countered
this way, that spell's controller loses 4 life and
you gain 4 life.
Instant and sorcery spells cost {2} less to cast.
As Luca and Julia battled in Noctur's cathedral, all
of Somnia was flooded.