Natux, Ruler of the Ikal

Victorious - Whenever Natux, Ruler of the Ikal
destroys a creature, demon spells you cast cost {1} less until end of turn.
Whenever a demon enters the battlefield, you
may have Natux, Ruler of the Ikal fight another
creature.
Despite Natux losing his horns in a duel, his subjects
do not mock him as they do to others - the
consequences are too dire.